Annotation of /linuxsampler/trunk/ChangeLog

Version SVN trunk (?)

  * Real-time instrument scripts:
    - Fix: Do not share compiled instrument scripts among multiple engine
      channels (sampler parts) as this can lead to crashes and would allow the
      same global script variables to be accessible from multiple engine
      channels which would not be the expected behaviour by instrument script
      authors.

  * GigaStudio/Gigasampler format engine:
    - Use libgig's new IO-per-thread feature to avoid file I/O concurrency
      issues with .gig file.
    - Use libgig's new method gig::File::GetSample() with method
      gig::File::CountSamples() instead of now deprecated
      gig::File::GetFirstSample() / gig::File::GetNextSample() pair.
    - Use libgig's new method gig::Instrument::GetRegionAt() with method
      gig::Instrument:CountRegions() instead of now deprecated
      gig::Instrument::GetFirstRegion() / gig::Instrument::GetNextRegion() pair.
    - Use libgig's gig::File::GetInstrument() method with method
      gig::File::CountInstruments() instead of now deprecated
      gig::File::GetFirstInstrument() / gig::File::GetNextInstrument() pair.

  * MIDI driver:
    - VirtualMidiDevice: added method Reset() which is e.g. intended to be used
      in "panic" / MIDI "all sound off" / MIDI "all note off" situations.
    - VirtualMidiDevice: release all notes on MIDI CC #120 and CC #123.

Version 2.2.0 (9 May 2021)

  * general changes:
    - Fixed compiler error in Pool.h.
    - Require C++14 compiler support.
    - Autoconf: Added m4/ax_cxx_compile_stdcxx.m4 macro which is used
      for checking in configure for C++14 support (as mandatory
      requirement) and automatically adds compiler argument if required
      (e.g. -std=C++14).
    - RTMath: Implemented floating point comparison methods
      fEqual32(float,float) and fEqual64(double,double) which take the
      expected floating point tolerances into account.
    - Added public API C++ class "LFO", which is a cluster class encapsulating
      all the sampler's LFO implementations to be used by 3rd party applications
      (e.g. by Gigedit).
    - Added int math square LFO implementation.
    - Added int math saw LFO implementation.
    - Added numeric complex nr sine LFO implementation.
    - Marked class LFOTriangleDiHarmonic as deprecated
      (will be removed in future).
    - Added LFOAll.h which includes all LFO implementation's header files.
    - Refactored LFO class names and their file names (PulseLFO -> LFOPulse,
      LFOSawIntMath -> LFOSawIntMathNew, SawLFO -> LFOSawIntMathOld,
      SineLFO -> LFOSineBuiltinFn, LFOSine -> LFOSineNumericComplexNr,
      SquareLFO -> LFOSquarePulse and separated the latter to its own header
      file).
    - Renamed type LFOSigned -> LFOTriangleSigned.
    - Renamed type LFOUnsigned -> LFOTriangleUnsigned.
    - Using now cubic interpolation as resampling algorithm by default; and
      linear interpolation is deprecated now.
    - Event:Init(): memset() entire Event::Param union to zero instead of trying
      to do that for its individual members; the latter became error prone due
      to the union's growing complexity meanwhile.
    - EngineChannel: Overhaul of RPN/NRPN related methods: Added new
      *Rpn*Parameter*() methods as replacement for previous *Rpn*Controller*()
      methods and marked the old ones as deprecated; and likewise added new
      *Nrpn*Parameter*() methods as replacement for previous *Nrpn*Controller*()
      methods and marked those old ones deprecated as well.
    - Added support for MIDI CC #38 (data entry LSB): this allows higher value
      resolution for certain (e.g. hard coded) RPN and NRPN parameters.
    - Implemented support for compressed RPN/NRPN message sequences (that is to
      allow processing MIDI data entry messages without always having to be
      preceded strictly by RPN/NRPN parameter selection messages on each value
      change).
    - Added support for MIDI CC #96 (data increment) and MIDI CC #97 (data
      decrement).
    - Added support for 'null function RPN/NRPN' (which is RPN/NRPN parameter
      MSB=127 and LSB=127) and which is disabling subsequent data
      entry/increment/decrement CC messages.
    - Fixed crash when editing key groups (a.k.a. exclusive groups) with an
      instrument editor.
    - Fixed playing noise at the end of a disk stream under certain conditions.
    - Fixed potential crash with high pitch at end of RAM playback.
    - Added configure checks whether C++ compiler supports so called
      'designated initializers'.
    - Added global backtraceAsString() function for debugging purposes
      (POSIX systems only, no Windows implementation yet).
    - Thread class: Added new methods pushCancelable(), popCancelable(), name(),
      nameOfCaller() and setNameOfCaller().
    - configure: Always check for availability of pthread_testcancel() and use
      it if so (previously it was only used if explicitly enabled by configure
      option).
    - Thread class: raise compiler warning if pthread_testcancel() is not
      available, because it can lead to deadlocks.
    - Mutex class: Implemented optional bug detection and deadlock debugging
      features.
    - Ref<> class is now thread safe (as lock-free and wait-free
      implementation).
    - Fixed compilation error with Bison >= 3.6.0.
    - Fixed rare crash when switching between instruments that had instrument
      scripts loaded.
    - Allow EffectChain::InsertEffect() as alternative to
      EffectChain::AppendEffect() (i.e. with index equal to current chain size).
    - ConstCapacityArray class: Fixed bug in remove() method.
    - Fixed crash on certain MIDI RPN and NRPN messages that occurred if no
      real-time instrument script was loaded.

  * Real-time instrument scripts:
    - Added method ScriptVM::setExitResultEnabled() which allows to
      explicitly enable the built-in exit() function to optionally accept
      one function argument; the value of the passed exit() function
      argument will then become available by calling
      VMExecContext::exitResult() after script execution.
    - 64 bit support for NKSP integer scripts variables (declare $foo).
    - Variable names, function names and preprocessor condition names must start
      with a regular character (a-z or A-Z); starting them with a digit or
      underscore is not allowed.
    - NKSP parser fix: equal comparison operator "=" and not equal comparison
      operator "#" must only accept integer operands.
    - NKSP language: Implemented support for standard units like Hertz, seconds,
      Bel including support for metric unit prefixes; so one can now e.g.
      conveniently use numbers in scripts like "5us" meaning "5 microseconds",
      or e.g. "12kHz" meaning "12 kilo Hertz", or e.g. "-14mdB" meaning
      "minus 14 Millidecibel", or e.g. "28c" meaning "28 cents" (for tuning).
    - NKSP language: Introduced "final" operator "!" which is specifically
      intended for synthesis parameter values to denote that the synthesis
      parameter value is intended to be the "final" value for that synthesis
      parameter that should explicitly be used by the engine and thus causing
      the sampler engine to ignore all other modulation sources for the same
      synthesis parameter (like e.g. LFO, EG); by simply prefixing a value,
      variable or formula with this new "!" operator the expression is marked as
      being "final".
    - NKSP script editor API: Added support for detecting standard unit tokens
      and their potential metric prefix token.
    - NKSP language: Added support for NKSP real number literals and
      arithmetic operations on them (e.g. "(3.9 + 2.9) / 12.3 - 42.0").
    - NKSP language: Added support for NKSP real number (floating point) script
      variables (declare ~foo).
    - NKSP language: Added support for NKSP real number (floating point) array
      script variables (declare ?foo[]).
    - Built-in script function "message()" accepts now real number argument as
      well.
    - Added built-in script function "real_to_int()" and its short hand form
      "int()" for casting from real number to integer in NKSP scripts.
    - Added built-in script function "int_to_real()" and its short hand form
      "real()" for casting from integer to real number in NKSP scripts.
    - Allow built-in exit() function to potentially accept real number type
      argument as well.
    - Built-in script functions may have a different return type depending on
      the arguments passed to the function.
    - Built-in script function "abs()" optionally accepts and returns real
      number.
    - Built-in script functions "min()" and "max()" optionally accept real
      number arguments and return real number as result in that case.
    - NKSP VM API: Allow units and 'final'ness to be returned as result from
      built-in functions (added methods VMFunction::returnUnitType() and
      VMFunction::returnsFinal() for that purpose which must be implemented by
      built-in function implementations).
    - NKSP language: Allow metric unit prefixes of numeric scalar and array
      variables to be changed freely at runtime (unlike unit types like Hz etc.
      which are still sticky, parse-time features of variables which cannot be
      changed at runtime for the intentional sake of determinism).
    - NKSP language: 'final' values are prohibited for array variables for now
      (attempt causes a parsers error).
    - NKSP language: expressions with unit types (e.g. Hz) are prohibited for
      conditions of runtime control structures like if(), while(), select()
      (attempt causes a parser error).
    - NKSP VM API: Allow built-in functions to perform their own, individual
      parse time checks of arguments going to be passed to the function at
      runtime (added method VMFunction::checkArgs() for that purpose).
    - NKSP language: raise parser warning if only one operand of binary
      operators (like logical 'or' comparison) contain a 'final' value (because
      it would always yield in a 'final' result in such cases).
    - NKSP language: Allow comparison (=, #, <, >, <=, >=) of values with
      different metric unit prefixes, which will behave as expected (e.g.
      result of expression '1000us < 2ms' is true).
    - NKSP language: Allow adding values with different metric unit prefixes
      (e.g. result of expression '100Hz + 5kHz' is '5100Hz').
    - NKSP language: Allow subtracting values with different metric unit
      prefixes (e.g. result of expression '1ms - 20us' is '980us').
    - NKSP language: Allow multiplying with any metric unit prefixes
      (e.g. result of expression '2k * 3ms' is '6s'), however multiplications
      with unit types on both sides (e.g. '2s * 2s') is still prohibited since
      we don't have any considerable practical use for a term like '4s^2'
      (hence any attempt multiplying two unit types still causes parser error).
    - NKSP language: Allow dividing by any metric unit prefixes and allow
      division of same unit type on both sides (e.g. expression '8kHz / 1000Hz'
      yields in unit free result '8'). So this is now a way to cast units away
      e.g. for passing the result to other expressions, certain function calls
      or variables which are not accepting any units (or that specific unit).
    - NKSP language: integer arrays and real number arrays can now be converted
      to strings (e.g. for dumping their content with message() calls for
      script debugging purposes).
    - NKSP language: expressions and variables with units are now correctly
      casted to strings (e.g. with message() calls).
    - NKSP language: comparing real numbers for equalness (e.g. '~foo = 3.1') or
      unequalness (e.g. '~foo # 3.1') is now less strict and takes the expected
      floating point tolerances into account.
    - NKSP VM API: Added methods VMScalarNumberExpr::evalCastInt() and
      VMScalarNumberExpr::evalCastReal().
    - NKSP VM API: Added base class 'VMNumberArrayExpr' for classes
      'VMIntArrayExpr' and 'VMRealArrayExpr'.
    - NKSP VM API: replaced all unitPrefix() (parse time) methods by
      unitFactor() (runtime) methods.
    - Built-in function "exit()" supports now returning units and 'final'ness
      for test cases.
    - The following built-in functions support now units as well: "abs()",
      "random()", "inc()", "dec()", "in_range()", "min()", "max()",
      "real_to_int()", "int()", "int_to_real()" and "real()".
    - Built-in functions "array_equal()", "search()" and "sort()" support now
      real number arrays (correctly) as well.
    - Added individual parse time checks of arguments to be passed to built-in
      functions "random()", "inc()", "dec()", "in_range()", "min()", "max()",
      "array_equal()" and "search()" specific for their individual purposes.
    - NKSP VM refactoring: Renamed all methods, functions and classes matching
      pattern *ScalarNumber* to simply *Number* (that is i.e. classes
      VMScalarNumberExpr -> VMNumberExpr, ScalarNumberExpr -> NumberExpr,
      ScalarNumberVariable -> NumberVariable, ScalarNumberBinaryOp ->
      NumberBinaryOp, VMScalarNumberResultFunction -> VMNumberResultFunction,
      method VMExpr::asScalarNumberExpr() -> VMExpr::asNumber(), function
      isScalarNumber() -> isNumber()).
    - NKSP VM API: Added 4 overridden methods to class VMNumberExpr:
      evalCastInt(MetricPrefix_t), evalCastInt(MetricPrefix_t,MetricPrefix_t),
      evalCastReal(MetricPrefix_t), evalCastReal(MetricPrefix_t,MetricPrefix_t)
      as convenient methods for automatically converting values to expected
      metric value basis.
    - Built-in function "wait()" accepts now both integers and real numbers as
      argument.
    - NKSP VM API cleanup: Get rid of legacy method
      VMFunction::argType(vmint iArg) which was already superseded by its new
      replacement VMFunction::acceptsArgType(vmint iArg, ExprType_t type).
    - NKSP parser: if wrong argument type was passed to a built-in function and
      that built-in function accepts more than one data type for the argument,
      then show all supported data types as parser error message.
    - Built-in function "play_note()" accepts now real numbers and seconds as
      unit type as well for its 3rd and 4th function arguments.
    - The following built-in functions accept now real numbers as well for their
      2nd function argument: "change_vol()", "change_tune()", "change_cutoff()",
      "change_attack()", "change_decay()", "change_release()",
      "change_sustain()", "change_cutoff_attack()", "change_cutoff_decay()",
      "change_cutoff_sustain()", "change_cutoff_release()",
      "change_amp_lfo_freq()", "change_cutoff_lfo_freq()",
      "change_pitch_lfo_freq()", "change_vol_time()", "change_tune_time()",
      "change_pan_time()", "fade_in()", "fade_out()", "change_play_pos()".
    - Fixed built-in function "change_play_pos()" not having accepted metric
      prefixes at all.
    - Fixed the following built-in functions having misinterpreted values given
      with unit type (for their 2nd argument) as if they were relative values
      (that is as if they were passed without a unit type): "change_attack()",
      "change_decay()", "change_release()", "change_cutoff_attack()",
      "change_cutoff_decay()", "change_cutoff_release()".
    - Fixed the following built-in functions having applied completely wrong
      'final' values: "change_sustain()", "change_cutoff_sustain()" (since the
      respective EGs being their modulation sink assume uint data type with
      value range 0..1000 instead of 0.0..1.0.
    - Added individual parse-time checks of function arguments for the following
      built-in functions: "play_note()", "note_off()", "set_event_mark()",
      "delete_event_mark()", "by_marks()", "change_cutoff()", "change_attack()",
      "change_decay()", "change_release()", "change_cutoff_attack()",
      "change_cutoff_decay()", "change_cutoff_release()",
      "change_amp_lfo_freq()", "change_cutoff_lfo_freq()",
      "change_pitch_lfo_freq()", "change_vol_time()", "change_tune_time()" and
      "change_pan_time()".
    - Don't abort function call if unit type was used and at the same time
      'final' operator was omitted for the primary value argument of the
      following built-in functions: "change_cutoff()", "change_attack()",
      "change_decay()", "change_release()", "change_cutoff_attack()",
      "change_cutoff_decay()", "change_cutoff_release()",
      "change_amp_lfo_freq()", "change_cutoff_lfo_freq()",
      "change_pitch_lfo_freq()", "change_vol_time()", "change_tune_time()",
      "change_pan_time()", instead imply 'final'ness at runtime and raise an
      appropriate parser warning at parse time.
    - Added built-in real number functions "round()", "ceil()", "floor()",
      "sqrt()", "log()", "log2()", "log10()", "exp()", "pow()", "sin()",
      "cos()", "tan()", "asin()", "acos()", "atan()".
    - Added built-in script real number constant "~NI_MATH_PI".
    - Added built-in script real number constant "~NI_MATH_E".
    - NKSP language: Allow unary '+' operator.
    - Added built-in script functions "msb()" and "lsb()".
    - NKSP language: Added support for RPN event handler
      ("on rpn ... end on" in instrument scripts).
    - NKSP language: Added support for NRPN event handler
      ("on nrpn ... end on" in instrument scripts).
    - Added built-in read-only variables "$RPN_ADDRESS" and "$RPN_VALUE" which
      may be read from the new RPN/NRPN script handlers to get the (N)RPN
      parameter that had been changed and its new value.
    - Added built-in const variables "$NI_CB_TYPE_RPN" and "$NI_CB_TYPE_NRPN"
      which are identifying the new (N)RPN handlers as such at script runtime.
    - Implemented built-in script function "set_rpn()".
    - Implemented built-in script function "set_nrpn()".
    - Fix: built-in functions returning an array type were broken and caused a
      crash when the built-in function's (supposed to be array) result value was
      used by the script VM.
    - Removed upper value constraint for 2nd argument of built-in functions
      "change_amp_lfo_freq()", "change_cutoff_lfo_freq()",
      "change_pitch_lfo_freq()","change_reso()", "change_cutoff()",
      "change_amp_lfo_depth()", "change_cutoff_lfo_depth()" and
      "change_pitch_lfo_depth()", to allow e.g. passing value 2000000 to double
      the LFO frequency / resonance / cutoff frequency.
    - Reduced code involved for parsing NKSP variable declarations by using 2
      generalized grammar rules with optional components (i.e. optional value
      assignment and optional variable qualifiers) instead of previous linear
      combinations of grammar rules, which also fixes some edge case.
    - NKSP language parser: track code block locations also by a) raw byte
      position in NKSP source code string and b) length of that code block in
      bytes (along to the already existing code block tracking by line/column);
      and added appropriate new members to public C++ API classes like
      'firstByte' and 'lengthBytes' to class VMSourceToken and struct CodeBlock.
    - NKSP language: Added support for 'patch' variable qualifier (capture their
      locations and allow replacement of their assignment expression via VM C++
      API).
    - Fixed incorrect EG times if standard measuring unit was passed to built-in
      functions "change_attack()", "change_decay()" or "change_release()".
    - Fixed intermediate function result values never having reflected any
      standard measuring unit type.
    - Fixed re-entrant issue with function calls which caused wrong result
      values if the same function was called multiple times in a term
      (specifically if metric prefixes were used).
    - NKSP language: Just throw a warning, not an error if an array variable of
      size zero was declared.
    - NKSP language: Allow omitting explicit array size on array variable
      declaration if combined with immediate value assignment
      (e.g. declare %foo[] := ( 1, 2, 3 ) ).
    - NKSP language: emit warning if an array variable was declared with bigger
      array size than amount of initial values been assigned, and initialize the
      missing array elements with zero in this case.
    - Fixed built-in NKSP exit() function to behave as return statement.
    - NKSP parser: Fixed crash if unary '-' operator was used on a non-number
      data type.
    - NKSP VM: Fixed the "release" handler being executed too often under
      certain situations if polyphonic data was passed from "note" handler to
      "release" handler.
    - Fixed memory leak in NKSP parser: string tokens were allocated as C
      strings and never freed.
    - Fixed incorrect polyphonic data transfer from wrong note handler to
      release handler; which also fixes no release handler being executed
      sometimes, and due to the latter it also fixes potential crashes as some
      polyphonic script events were never released and the engine hence was
      running out of free script events.
    - Fixed crash when handling array results of built-in functions
      (e.g. "num_elements(by_marks($MARK_1)").
    - NKSP VM: Fixed dead note events not been removed from user's event groups
      (i.e. causing incorrect behaviour of built-in NKSP functions by_marks()
      and set_event_mark() after max. size of event group list was exhausted).

  * test cases:
    - Fixed compiler errors in test cases.
    - Updated README for how to compile & run test cases.
    - Updated test case
      MutexTest::testDoubleLockStillBlocksConcurrentThread() to latest
      expected behaviour of the Mutex class implementation (recursive
      mutex type).
    - Added test cases for NKSP core language aspects and core built-in
      functions.
    - Fixed thread tests segfaulting on Linux.
    - NKSP: Added real number test cases for built-in functions exit(),
      int_to_real(), real(), real_to_int() and int(), as well as for the
      plus, minus and negate language operators.
    - Added massive amount of NKSP test cases for standard measuring units and
      'final' operator usage cases.
    - Added NKSP test cases for (floating point tolerance aware) real number
      equalness / unequalness comparison.
    - Added NKSP int array and real array tests for value assignment and
      initialization of arrays.
    - Added NKSP test cases for built-in functions "round()", "ceil()",
      "floor()", "sqrt()", "log()", "log2()", "log10()", "exp()", "pow()",
      "sin()", "cos()", "tan()", "asin()", "acos()", "atan()".
    - Added NKSP test cases for unary '+' operator.
    - Added NKSP test cases for core built-in variables.
    - Added thorough NKSP test cases for variable declarations.

  * GigaStudio/Gigasampler format engine:
    - LFOTriangleIntMath and LFOTriangleIntAbsMath: Fixed FlipPhase=true
      behaviour for start_level_mid.
    - Changed LFO start levels: LFO1 and LFO2 both to mid, LFO3 to max. start
      level (see discussion "GigaStudio LFO compatibility" on mailing list
      from 2019-09-26 for details).
    - Changed default wave form for all 3 LFOs to sine (instead of triangle;
      see discussion "GigaStudio LFO compatibility" on mailing list from
      2019-09-26 for details).
    - Format extension: Added support for different LFO wave forms (currently
      either sine [default], triangle, saw or square).
    - Format extension: Added support for LFO phase displacement (0��..360��).
    - Format extension: Added support for flipping LFO polarity on LFO 3
      (in the original gig format this was only available for LFO 1 and LFO 2).
    - Format extension: Support for additional filter types:
      lowpass 1/2/4/6-pole, highpass 1/2/4/6-pole, bandpass 2-pole,
      bandreject 2-pole.
    - Fixd potential crash with polynomial interpolator and max. pitch.
    - If minimum cutoff is defined, remap cutoff controller CC values to really
      span the entire possible cutoff range (and avoiding a dead controller
      zone).
    - Implemented support for loading instrument scripts with 'patch' variables
      (by patching these script variables with potentially overridden ones by
      gig Instrument).

  * SFZ format engine:
    - Fixed support for regions with loccN/hiccN conditions on more than one
      MIDI controller.
    - Fixed internal opcode 'xfin_hivel' falsely being set by user opcode
      'xfin_lovel' (patch by Christian Czezatke).

  * Benchmarks:
    - Fixed benchmarks/triang.cpp falsely having favoured "int math abs"
      algorithm (since result of 2nd run was not accumulated).
    - Added benchmark for saw wave (benchmarks/saw.cpp).
    - Added benchmark for sine wave (benchmarks/sine.cpp).
    - Added benchmark for square wave (benchmarks/square.cpp).
    - Increased amount of benchmarks runs by factor 6 to achieve benchmark times
      which are large enough on modern systems.

Version 2.1.1 (27 Jul 2019)

  * Real-time instrument scripts:
    - Fixed behavior of built-in NKSP functions change_sustain(),
      change_cutoff_attack(), change_cutoff_decay(), change_cutoff_sustain()
      and change_cutoff_release().

  * general changes:
    - Only play release trigger samples on sustain pedal up if this behaviour
      was explicitly requested by the instrument (otherwise only on note-off).
    - Fixed compiler warnings.
    - Fixed compilation error when cross-compiling to Mac.
    - FX Sends: Provide more useful error messages on routing problems
      (see bug #169).
    - LSCP doc: Be more clear describing the two distinct approaches
      of using external vs. internal effects (see bug #169).
    - "optional" class: Fixed comparison operators.

  * Gigasampler/GigaStudio format engine:
    - Format extension: If requested by instrument then don't play release
      trigger sample on note-off events.

  * SFZ format engine:
    - Fixed memory leak when releasing samples
      (fixes bug #307, patch by Jacek Roszkowski)
    - Fixed potential crash when a sample is shared by more than one region
      (fixes bug #308, patch by Jacek Roszkowski).
    - Opcode 'sample': Added support for built-in sample '*silence'
      (fixes bug #310, patch by Jacek Roszkowski).

Version 2.1.0 (25 Nov 2017)

  * SFZ format engine:
    - added support for <global>, <master> and #define (patch by Alby M)
    - Removed code duplication in SFZ file loading code.
    - Added support for sfz extension opcode 'script' which may be used to
      load real-time instrument script file (NKSP script language).
    - Implemented opcode set_ccN (initial patch by Giovanni Senatore).
    - Fixed unintended volume fade-in of voices under certain conditions.
    - sfz parser: allow missing space between header and opcode

  * Gigasampler/GigaStudio format engine:
    - Fixed clicks and pumping noise with Lowpass Turbo filter on very low
      cutoff settings.
    - Got rid of resembling an ancient GSt misbehavior which did not pitch at
      all if an up-pitch of more than 40 semi tones was requested (I don't
      think there is any stock gig sound that requires this behavior to
      resemble its original sound).
    - Added support for controlling whether the individual EGADSR stages may
      be aborted (as LinuxSampler extension to the original GigaStudio 4
      format).

  * general changes:
    - fixed printf type errors (mostly in debug messages)
    - use unique_ptr instead of auto_ptr when building with C++11
    - Added RTAVLTree class which is a real-time safe ordered multi-map, thus
      allowing to sort data efficiently in real-time safe manner.
    - RTList class: added methods for moving/inserting elements to arbitrary
      position within a list.
    - RTList class: added method fromPtr() for creating an Iterator object from
      a raw element pointer.
    - Attempt to partly fix resetting engine channels vs. resetting engine, an
      overall cleanup of the Reset*(), ConnectAudioDevice(),
      DisconnectAudioDevice() API methods would still be desirable though,
      because the current situation is still inconsistent and error prone.
    - Active voices are now internally grouped to "Note" objects, instead of
      being directly assigned to a keyboard key. This allows more fine graded
      processing of voices, which is i.e. required for certain instrument
      script features.
    - Fix: Release trigger voices were not spawned on sustain pedal up
      (CC #64) events.
    - Fix: Release trigger voices can now also distinguish correctly between
      note-off and sustain pedal up events.
    - All engines: Increased ramp speed of volume smoother and pan smoother
      (while slow rate of crossfade smoother is preserved) to allow quick
      volume and pan changes by instrument scripts for instance.
    - gig/sf2/sfz: Fixed aftertouch channel pressure events being processed
      properly and thus were ignored for certain uses.
    - Added new C++ API method
      VirtualMidiDevice::SendChannelPressureToSampler().
    - windows, 32-bit: fixed potential crashes by making sure the stack in
      sub threads is 16-byte aligned
    - fixed numerous compiler warnings
    - Fixed invalid (note-on) event ID being assigned to new Note objects.
    - Revised fundamental C++ classes "Thread", "Mutex" and "Condition" which
      fixes potential undefined behavior.
    - Fixed Note object leak when triggering notes on keys which did not
      have a valid sample mapped (fixes bug #252).
    - Fixed compilation errors when compiling with CONFIG_DEVMODE enabled.
    - linuxsampler binary fix: option --create-instruments-db ignored
      subsequent optional argument due to glibc's implementation oddity
      which expects a "=" sign, but no space between them.

  * packaging changes:
    - removed unnecessary dependency to libuuid
      (originated by libgig's usage of it)
    - Automake: set environment variable GCC_COLORS=auto to allow GCC to
      auto detect whether it (sh/c)ould output its messages in color.
    - Debian: Fixed packaging error about invalid "Source-Version"
      substitution variable.
    - Debian: Raised Debian compatibility level to Debian 9 "Stretch".
    - Debian: Added build dependency to libsqlite3-dev for building
      linuxsampler with instruments DB support.

  * Real-time instrument scripts:
    - Implemented scheduler for delayed MIDI events and for suspended scripts.
    - Built-in script function "wait()": implemented support for function's
      "duration-us" argument, thus scripts using this function are now
      correctly resumed after the requested amount of microseconds.
    - Built-in script function "play_note()": implemented support for
      function's "duration-us" argument, thus notes triggered with this
      argument are now correctly released after the requested amount of
      microseconds.
    - Fix: script events were not cleared when engine channel was reset,
      potentially causing undefined behavior.
    - Fixed crash which happened when trying to reference an undeclared
      variable.
    - Built-in script function "play_note()": Added support for passing
      special value -1 for "duration-us" argument, which will cause the
      triggered note to be released once the original note was released.
    - Instrument script classes now exported with the liblinuxsampler C++ API.
    - Added new API method ScriptVM::syntaxHighlighting() which provides
      a convenient syntax highlighting backend for external instrument
      script editor applications.
    - Added new C++ API class "ScriptVMFactory".
    - Extended parser issues to provide not only first line and first
      column, but also last line and last column of issue (thus marking
      the precise span of the issue within the source code).
    - Reload script automatically after being modified by an instrument
      editor.
    - NKSP language grammar correction: allow empty event handler bodies
      like "on note end on".
    - Implemented built-in script function "change_vol()".
    - Implemented built-in script function "change_tune()".
    - Implemented built-in script function "change_pan()".
    - Implemented built-in script function "change_cutoff()".
    - Implemented built-in script function "change_reso()".
    - Implemented built-in script function "event_status()".
    - Added built-in script constants "$EVENT_STATUS_INACTIVE" and
      "$EVENT_STATUS_NOTE_QUEUE" both for being used as flags for
      "event_status()" function.
    - NKSP language: Added support for bitwise operators ".or.", ".and."
      and ".not.".
    - NKSP language scanner: Fixed IDs matching to require at least one
      character (i.e. when matching function names or variable names).
    - NKSP language scanner: disabled unusued rules.
    - Fixed behavior of play_note() and note_off() functions which must
      be distinguished engine internally from "real" MIDI note on/off
      events in order to avoid misbehaviors like hanging notes.
    - Implemented built-in script variable "$KSP_TIMER".
    - Implemented built-in script variable "$NKSP_REAL_TIMER".
    - Implemented built-in script variable "$NKSP_PERF_TIMER".
    - Implemented built-in script variable "$ENGINE_UPTIME".
    - Implemented built-in script function "inc()".
    - Implemented built-in script function "dec()".
    - NKSP language fix: division expressions were evaluated too often.
    - NKSP language fix: string concatenation operator was right
      associative instead of left (to right).
    - NKSP language correction: allow empty statements in entire language
      (i.e. "if end if").
    - Implemented built-in script function "stop_wait()".
    - Implemented built-in script variable "$NI_CALLBACK_ID".
    - Implemented built-in script variable "$NI_CALLBACK_TYPE".
    - Implemented built-in script variable "$NKSP_IGNORE_WAIT".
    - Added support for read-only built-in variables (respectively
      handled by the script parser).
    - Added built-in script constant "$NI_CB_TYPE_INIT".
    - Added built-in script constant "$NI_CB_TYPE_NOTE".
    - Added built-in script constant "$NI_CB_TYPE_RELEASE".
    - Added built-in script constant "$NI_CB_TYPE_CONTROLLER".
    - NKSP Language: Added support for user defined script functions.
    - Implemented built-in script function "change_attack()".
    - Implemented built-in script function "change_decay()".
    - Implemented built-in script function "change_release()".
    - Fixed all change_*() built-in script functions to apply their
      synthesis parameter changes immediately in case the respective note
      was triggered at the same time, instead of scheduling the parameter
      change, especially because it would cause some parameter types's
      changes either to be ramped (i.e. change_vol()) or other types even
      to have not effect at all (i.e. change_attack()).
    - Implemented built-in script function "sh_left()".
    - Implemented built-in script function "sh_right()".
    - Implemented built-in script function "min()".
    - Implemented built-in script function "max()".
    - NKSP Fix: "init" event handler was not always executed when a script
      was loaded.
    - NKSP built-in wait() script function: abort script execution if
      a negative or zero wait time was passed as argument (since this is
      a common indication of a bug either of the script or even of the
      engine, which could lead to RT instability or even worse).
    - ScriptVM: Implemented automatic suspension of RT safety
      threatening scripts.
    - Provide more user friendly error messages on syntax errors.
    - Fixed NKSP parser warning "Not a statement" when assigning an
      initializer list to an array variable.
    - Implemented built-in script array variable "%ALL_EVENTS".
    - Implemented built-in script function "in_range()".
    - Implemented built-in script function "change_amp_lfo_depth()".
    - Implemented built-in script function "change_amp_lfo_freq()".
    - Implemented built-in script function "change_pitch_lfo_depth()".
    - Implemented built-in script function "change_pitch_lfo_freq()".
    - Implemented built-in script function "change_vol_time()".
    - Implemented built-in script function "change_tune_time()".
    - Implemented built-in script function "fade_in()".
    - Implemented built-in script function "fade_out()".
    - Fixed acceptance of wrong data type of parameters passed to built-in
      script functions "change_vol()", "change_tune()", "change_pan()",
      "change_cutoff()", "change_reso()", "change_attack()", "change_decay()",
      "change_release()", "change_amp_lfo_depth()", "change_amp_lfo_freq()",
      "change_pitch_lfo_depth()" and "change_pitch_lfo_freq()".
    - Added built-in script function "get_event_par()" and implemented some
      of its possible parameter selections.
    - Added built-in script function "set_event_par()" and implemented some
      of its possible parameter selections.
    - Fixed a bunch of scheduler time related bugs.
    - Fixed polyphonic variables not being reset to zero after usage.
    - Built-in "ignore_event()" function: argument is now optional, like with
      built-in function "ignore_controller()".
    - Implemented built-in script function "change_velo()".
    - Implemented built-in script function "change_note()".
    - Adjusted behavior of "change_vol()" and "change_tune()" to a more
      intuitive behavior if used in combination with "change_vol_time()" or
      "change_tune_time()" respectively: now tuning/volume changes are only
      assigned (without delay) immediately to a new note if the respective
      timing function has not been called before, otherwise the volume/tuning
      changes are automatically faded (before, only the event's time stamp was
      relevant).
     - Implemented built-in script function "array_equal()".
     - Implemented built-in script function "search()".
     - Implemented built-in script function "sort()".
     - NKSP Fix: Never suspend "init" event handlers.
     - Implemented built-in script function "same_region()" (currently only
       available for gig format engine).
     - Added built-in script constant "$NKSP_LINEAR".
     - Added built-in script constant "$NKSP_EASE_IN_EASE_OUT".
     - Implemented built-in script function "change_vol_curve()".
     - Implemented built-in script function "change_tune_curve()".
     - built-in "play_note()" function now supports a sample playback start
       offset with argument 3, where special value -1 means to use the regular
       sample offset as defined by the instrument file.
     - Built-in array variable %KEY_DOWN[] is now a read-only variable.
     - Built-in variable $EVENT_NOTE is now a read-only variable.
     - Built-in variable $EVENT_VELOCITY is now a read-only variable.
     - built-in "play_note()" function now accepts -2 for its fourth argument
       (note duration) which means the life time of the note shall be sticked
       to the requested note number of argument 1.
     - Fix: built-in "play_note()" function now returns 0 as result value if
       -1 was passed for its fourth argument (note duration) and the respective
       parent note is already gone.
    - Implemented built-in script function "change_play_pos()".
    - NKSP language: Added support for user declared const array variables.
    - NKSP language: Raise parser warning if array variable is accessed with
      an index that exceeds the array's size.
    - NKSP language fix: Unknown characters were not handled correctly.
    - NKSP language: Added support for "synchronized .. end synchronized"
      code blocks.
    - Implemented built-in script function "abort()" which allows to abort
      another script handler by passing its callback ID.
    - Fixed potential memory access bug and potential undefined behavior of
      "init" event handlers.
    - Print a time stamp along to each call of built-in function "message()".
    - ScriptVM API: Added VMParserContext::preprocessorComments() which allows
      to retrieve all code blocks filtered out by the preprocessor.
    - Added built-in script function "fork()".
    - Added built-in array variable %NKSP_CALLBACK_CHILD_ID[].
    - Added built-in variable $NKSP_CALLBACK_PARENT_ID.
    - Fixed potential crash when accessing dynamic built-in array variables.
    - Added built-in script function "callback_status()".
    - Added built-in constant $CALLBACK_STATUS_TERMINATED.
    - Added built-in constant $CALLBACK_STATUS_QUEUE.
    - Added built-in constant $CALLBACK_STATUS_RUNNING.
    - Removed max. value limitation of built-in functions "change_attack()",
      "change_decay()" and "change_release()" to i.e. allow passing 2000000
      for doubling the respective time.
    - NKSP script editor syntax highlighting API: Fixed app termination due
      to a lexer start condition stack underrun.
    - NKSP preprocessor: Fixed wrong behavior on nested USE_CODE_IF() and
      USE_CODE_IF_NOT() preprocessor statements.
    - NKSP: Added built-in preprocessor condition NKSP_NO_MESSAGE, which
      can be set to disable all subsequent built-in "message()" function calls
      on preprocessor level.
    - Implemented built-in script function "change_sustain()".
    - NKSP script editor syntax highlighting API: catch all fatal lexer errors,
      to avoid the editor app to crash on ill-formed text input.
    - Added built-in script function "change_pan_time()".
    - Added built-in script function "change_pan_curve()".
    - Added built-in script function "change_cutoff_attack()".
    - Added built-in script function "change_cutoff_decay()".
    - Added built-in script function "change_cutoff_sustain()".
    - Added built-in script function "change_cutoff_release()".
    - Added built-in script function "change_cutoff_lfo_depth()".
    - Added built-in script function "change_cutoff_lfo_freq()".

  * Instruments DB:
    - Fixed memory access bug of general DB access code which lead to
      undefined behavior.
    - Cleanup of instruments DB file creation and opening code.
    - The instrument DB path of linuxsampler's --create-instruments-db argument
      is now optional, if it is missing, then a default location is used.
    - Added support for scanning SFZ (.sfz) files.
    - Added support for scanning Sound Font (.sf2) files.
    - Fixed undefined DB transaction behavior.

Version 2.0.0 (15 July 2015)

  * packaging changes:
    - fixed building with newer MinGW-w64
    - Mac OS X: support the new dir for Core Audio SDK
    - Mac OS X: fixed building outside source directory
    - made sure all source files for hostplugins are included when
      doing "make dist"
    - removed empty directories left from the cvs to svn migration
    - fixed compilation with gcc 4.6.1
    - another "make dist" fix, for the LV2 plugin
    - made --enable-pthread-testcancel default on Mac OS X
    - minor Makefile fix for building lscpparser when build and source
      directories are separate
    - Mac OS X: made it possible to specify plugin installation dir to
      configure
    - Mac OS X: Makefile fix for the install-strip target
    - fixed compilation with gcc 4.7
    - fixed configure script error with old autoconf versions
    - lsatomic.h: use gcc provided atomic functions if building with
      gcc 4.7 and C++11
    - modernized configure script
    - fixed linkage error when building with
      LDFLAGS="-Wl,--no-undefined" (#190)
    - fixed compilation with Clang 3.2
    - removed usage of deprecated Automake variable INCLUDES
    - fixed building with C++11
    - build fix: ChangeFlagRelaxed.h was missing in makefile
    - build fix: libsndfile compiler flags were missing in some
      makefiles
    - fix for building with bison 3.0 (#202)
    - Mac OS X: added temporary hack allowing to spawn gigedit as callback
      on the process's main thread
    - fixed build error on newer MinGW
    - support building with older jack versions
    - support building with spaces in vst sdk path
    - enabled automake 'subdir-objects' option and moved external
      source references (vst, au, asio) from makefiles to cpp files,
      in order to get rid of warnings from automake 1.14

  * general changes:
    - Refactoring: moved the independent code from
      the Gigasampler format engine to base classes
    - command line option '--profile' is currently disabled, since the
      respective profiling code is currently broken
    - Introduced support for optional environment variable
      "LINUXSAMPLER_PLUGIN_DIR" which allows to override the directory
      where the sampler shall look for instrument editor plugins
      (patch by Luis Garrido, slightly modified).
    - implemented Roland GS NRPN 1ArrH which allows to set volume per note
    - implemented Roland GS NRPN 1CrrH which allows to set pan per note
    - implemented Roland GS NRPN 1DrrH which allows to set reverb send per
      note (in this implementation of the sampler its simply hard routed to
      the 1st effect send of the sampler channel, no matter what the actual
      effect type is)
    - implemented Roland GS NRPN 1ErrH which allows to set chorus send per
      note (in this implementation of the sampler its simply hard routed to
      the 2nd effect send of the sampler channel, no matter what the actual
      effect type is)
    - implemented support for internal LADSPA effects
    - raised limit of program change queue from 100 to 512
      (as suggested by Alex Stone)
    - implemented sine LFO, pulse LFO and saw LFO
    - experimental support for per voice equalization
    - added command line option --exec-after-init
    - Introduced new C++ API method:
      EngineChannel::InstrumentFileName(int index)
      allowing to retrieve the whole list of files used for the loaded
      instrument on an engine channel (a.k.a. part). Some GigaStudio
      instruments for example are splitted over several files like
      "Foo.gig", "Foo.gx01", "Foo.gx02", ...
    - Added new C++ API method Sampler::GetGlobalMaxVoices().
    - Added new C++ API method Sampler::GetGlobalMaxStreams().
    - Added new C++ API method Sampler::SetGlobalMaxVoices().
    - Added new C++ API method Sampler::SetGlobalMaxStreams().
    - Various "const" and "restrict" optimizations.
    - all engines: add pan CC value to instrument pan parameter before
      applying panning, instead of using two separate pan functions in
      series (#182)
    - added a lock guard class for exception safe mutex handling and
      used it everywhere appropriate
    - Immediately apply scale tuning changes to active voices.
    - Exposed scale tuning to C++ API (along to the already existing standard
      SysEx way).
    - lsatomic.h fixes: seq_cst load and store were suboptimal for x86
      and broken for ppc64. (Seq_cst loads and stores are actually not
      used in LS, so the bug wasn't noticable.)
    - lsatomic.h: added ARMv7 support
    - Added support for multiple MIDI input ports per sampler channel (and
      added various new C++ methods for this new feature / design change, old
      C++ API methods for managing SamplerChannel's MIDI inputs are now marked
      as deprecated but are still there and should provide full behavior
      backward compatibility).
    - AbstractEngine::GSChecksum(): don't allocate memory on the stack (was
      unsafe and caused compilation error with clang 2.x).
    - Bugfix: only process the latest MIDI program change event.
    - Introducing the LSCP shell, which provides convenient control of the
      sampler from the command line by providing LSCP aware features.
    - VirtualMidiDevice: Added support for program change.
    - VirtualMidiDevice: Added support for bank select (MSB & LSB).
    - VirtualMidiDevice: Added support for pitch bend.
    - Aftertouch: extended API to explicitly handle channel pressure and
      polyphonic key pressure events (so far polyphonic pressure was not
      supported at all, and channel pressure was rerouted as CC128 but not
      used so far).
    - Added initial support for real-time instrument scripts. The script VM
      code is shared by all sampler engine implemementations, however only the
      gig file format currently provides support for storing instrument scripts
      (as LinuxSampler extension to the original GigaStudio 4 format).

  * Gigasampler format engine:
    - implemented the "round robin keyboard" dimension
    - fixed round robin and random dimensions for cases when number of
      dimension zones is not a power of two
    - made round robin use a counter for each region instead of each
      key
    - bugfix: pitch LFO controller "internal+aftertouch" was broken
    - bugfix: filter keyboard tracking was broken
    - filter performance fix (an unnecessary copy was made of the
      filter parameters in each sub fragment)
    - handle special case when pan parameter in gig file has max or
      min value
    - Exclusive Groups: don't ever stop voices of the same note,
      doesn't sound naturally with a drumkit
    - fixed EG1 modulation when attack or release is zero
    - Fixed support for 'aftertouch' attenuation controller.
    - Fixed crash that happened with velocity split sounds under certain
      conditions (see also previous commit on libgig).
    - fixed behaviour of filter LFO

  * SFZ format engine:
    - Initial implementation (not usable yet)
    - added support for v2 multiple stage envelope generators
    - added a fine-tuned v1 envelope generator instead of using the
      one from the gig engine
    - fixed memory leak and memory handling errors
    - added support for trigger=first, trigger=legato and sw_previous
    - allow non-numerical key values ("C#4" for example)
    - "key" opcode now sets pitch_keycenter too
    - fixed error when unloading instrument with same sample used by
      multiple regions
    - added some opcode aliases, like loopmode for loop_mode, to be
      more compatible
    - added support for trigger=release and rt_decay
    - added support for off_mode=normal
    - added support for random, seq_position, seq_length and volume
    - added v1 LFO opcodes to parser (no support in engine yet)
    - added support for amp_veltrack and amp_velcurve_N
    - fine-tuned the default velocity curve
    - added support for transpose
    - fixed crash when using sw_down/up
    - improved logic for sw_lokey/hikey/up/down/last
    - added more v1 aliases to parser
    - reduced memory usage for sfz data
    - RT-safeness: avoid malloc in audio thread
    - fixed a bug that could cause voice stealing to fail
    - optimized sample lookup
    - improved support for exclusive groups (group, off_by and
      off_mode)
    - added support for controller triggered regions (on_locc/on_hicc)
    - added support for loop_mode=one_shot
    - fixed playback of 16 bit wav files on big endian CPUs
    - added support for Ogg Vorbis sample files
    - use loop markers from sample file if loop_start and loop_end are
      not set in sfz file
    - implemeted filters. Filter types: lowpass, bandpass, bandreject
      and highpass. 1, 2, 4 and 6 pole filters. Opcodes: fil_type,
      cutoff, resonance, fil_veltrack, fil_keytrack, fil_keycenter,
      cutoff_cc, cutoff_chanaft.
    - bugfix: zero ampeg_sustain didn't work
    - added support for velocity effect on amplifier envelope time
      (ampeg_vel2attack, ampeg_vel2decay, ampeg_vel2sustain and
      ampeg_vel2release)
    - added support for EG hold (ampeg_hold)
    - added support for sample offset (offset)
    - use the newly introduced signal units model
    - implemented opcodes lfoN_delay,
      lfoN_freq, lfoN_pan, lfoN_cutoff, lfoN_resonance
    - implemented opcodes ampeg_delay, ampeg_vel2delay
      pitcheg_delay, pitcheg_start, pitcheg_attack, pitcheg_hold,
      pitcheg_decay, pitcheg_sustain, pitcheg_release, pitcheg_vel2delay,
      pitcheg_vel2attack, pitcheg_vel2hold, pitcheg_vel2decay,
      pitcheg_vel2sustain, pitcheg_vel2release, pitcheg_depth
    - implemented opcodes pitchlfo_delay, pitchlfo_freq,
      pitchlfo_depth, fillfo_delay, fillfo_freq, fillfo_depth,
      amplfo_delay, amplfo_freq, amplfo_depth
    - implemented opcodes fileg_delay, fileg_start, fileg_attack,
      fileg_hold, fileg_decay, fileg_sustain, fileg_release, fileg_vel2delay,
      fileg_vel2attack, fileg_vel2hold, fileg_vel2decay, fileg_vel2sustain,
      fileg_vel2release
    - implemented opcode lfoN_wave
    - implemented opcode pitchlfo_depthccN
    - implemented opcodes lfoN_phase, lfoN_phase_onccX,
      lfoN_pitch, lfoN_pitch_onccX
    - implemented opcodes pitchlfo_fade,
      fillfo_fade, amplfo_fade, lfoN_fade, lfoN_fade_onccX
    - implemented opcodes fillfo_freqccN,
      pitchlfo_freqccN, amplfo_freqccN, lfoN_freq_onccX
    - implemented opcodes ampeg_delayccN, ampeg_startccN,
      ampeg_attackccN, ampeg_holdccN, ampeg_decayccN, ampeg_sustainccN,
      ampeg_releaseccN, egN_timeX_onccY, egN_levelX_onccY
    - lfoN_* and egN_* opcodes defined in group sections
      are now taken into account
    - implemented curves
    - implemented opcodes volume_onccN, volume_curveccN
    - implemented opcode volume_smoothccN
    - implemented opcodes fillfo_depthccN, amplfo_depthccN,
      lfoN_volume, lfoN_volume_onccX, lfoN_volume_smoothccX,
      lfoN_freq_smoothccX, lfoN_pitch_smoothccX, lfoN_pan_onccX,
      lfoN_pan_smoothccX, lfoN_cutoff_onccX, lfoN_cutoff_smoothccX,
      lfoN_resonance_onccX, lfoN_resonance_smoothccX, lfoN_delay_onccX
    - implemented opcode end
    - implemented opcodes egN_amplitude_onccX,
      egN_volume, egN_volume_onccX, egN_cutoff, egN_cutoff_onccX,
      egN_pitch, egN_pitch_onccX, egN_resonance, egN_resonance_onccX
    - implemented opcodes xfin_lokey, xfin_hikey,
      xfout_lokey, xfout_hikey, xf_keycurve, xfin_lovel, xfin_hivel,
      xfout_lovel, xfout_hivel, xf_velcurve, xfin_loccN, xfin_hiccN,
      xfout_loccN, xfout_hiccN, xf_cccurve
    - implemented opcodes pan_onccN, pan_smoothccN,
      pan_curveccN, egN_pan, egN_pan_curve, egN_pan_onccX,
      egN_pan_curveccX, pitch_veltrack
    - when failed to parse a sfz file
      print the line number on which the error occurs
    - use common pool of CC objects to minimize RAM usage
    - implemented opcodes amplfo_delay_onccN,
      amplfo_fade_onccN, fillfo_delay_onccN, fillfo_fade_onccN,
      pitchlfo_delay_onccN, pitchlfo_fade_onccN
    - implemented opcodes fileg_delay_onccN,
      fileg_start_onccN, fileg_attack_onccN, fileg_hold_onccN,
      fileg_decay_onccN, fileg_sustain_onccN, fileg_release_onccN,
      fileg_depth_onccN, pitcheg_delay_onccN, pitcheg_start_onccN,
      pitcheg_attack_onccN, pitcheg_hold_onccN, pitcheg_decay_onccN,
      pitcheg_sustain_onccN, pitcheg_release_onccN, pitcheg_depth_onccN
    - implemented automatic aliasing *ccN <-> *_onccN
    - *lfo_freqccN wasn't working when the respective *lfo_freq
      was not set or was set to zero
    - lfoN_freq_onccX wasn't working when lfoN_freq
      was not set or was set to zero
    - implemented opcodes resonance_onccN, resonance_smoothccN,
      resonance_curveccN, cutoff_smoothccN, cutoff_curveccN
    - implemented opcodes fillfo_depthchanaft,
      fillfo_freqchanaft, amplfo_depthchanaft, amplfo_freqchanaft,
      pitchlfo_depthchanaft, pitchlfo_freqchanaft
    - implemented opcodes pitch_onccN,
      pitch_curveccN, pitch_smoothccN, pitch_stepccN
    - implemented opcodes volume_stepccN, pan_stepccN,
      cutoff_stepccN, resonance_stepccN, lfoN_freq_stepccX,
      lfoN_volume_stepccX, lfoN_pitch_stepccX, lfoN_pan_stepccX,
      lfoN_cutoff_stepccX, lfoN_resonance_stepccX
    - implemented opcodes eq1_freq, eq2_freq, eq3_freq,
      eq1_freqccN, eq2_freqccN, eq3_freqccN, eq1_bw, eq2_bw, eq3_bw,
      eq1_bwccN, eq2_bwccN, eq3_bwccN, eq1_gain, eq2_gain, eq3_gain,
      eq1_gainccN, eq2_gainccN, eq3_gainccN
    - implemented opcodes delay, delay_onccN, delay_random,
      delay_samples, delay_samples_onccN
    - implemented opcodes egN_eq1gain, egN_eq2gain, egN_eq3gain,
      egN_eq1gain_onccX, egN_eq2gain_onccX, egN_eq3gain_onccX, egN_eq1freq,
      egN_eq2freq, egN_eq3freq, egN_eq1freq_onccX, egN_eq2freq_onccX,
      egN_eq3freq_onccX, egN_eq1bw, egN_eq2bw, egN_eq3bw, egN_eq1bw_onccX,
      egN_eq2bw_onccX, egN_eq3bw_onccX, lfoN_eq1gain, lfoN_eq2gain,
      lfoN_eq3gain, lfoN_eq1gain_onccX, lfoN_eq2gain_onccX, lfoN_eq3gain_onccX,
      lfoN_eq1gain_smoothccX, lfoN_eq2gain_smoothccX, lfoN_eq3gain_smoothccX,
      lfoN_eq1gain_stepccX, lfoN_eq2gain_stepccX, lfoN_eq3gain_stepccX,
      lfoN_eq1freq, lfoN_eq2freq, lfoN_eq3freq, lfoN_eq1freq_onccX,
      lfoN_eq2freq_onccX, lfoN_eq3freq_onccX, lfoN_eq1freq_smoothccX,
      lfoN_eq2freq_smoothccX, lfoN_eq3freq_smoothccX, lfoN_eq1freq_stepccX,
      lfoN_eq2freq_stepccX, lfoN_eq3freq_stepccX, lfoN_eq1bw, lfoN_eq2bw,
      lfoN_eq3bw, lfoN_eq1bw_onccX, lfoN_eq2bw_onccX, lfoN_eq3bw_onccX,
      lfoN_eq1bw_smoothccX, lfoN_eq2bw_smoothccX, lfoN_eq3bw_smoothccX,
      lfoN_eq1bw_stepccX, lfoN_eq2bw_stepccX, lfoN_eq3bw_stepccX
    - implemented opcodes eq1_vel2freq, eq2_vel2freq,
      eq3_vel2freq, eq1_vel2gain, eq2_vel2gain, eq3_vel2gain
    - sfz parser: allow double spaces in sample filenames
    - sfz parser: allow absolute paths for sample filenames
    - use linear decay and release for filter and pitch EG
    - bugfix: only the first amp_veltrack definition in a file was
      used
    - bugfix: looping was disabled if loop_start was set to 0
    - allow regions with end=-1 to turn off other regions using the
      group and off_by opcodes (#168)
    - made end=0 play the whole sample
    - fixed support for lochan and hichan opcodes (#155)
    - fixed crash when using lochan/hichan opcodes (#187)
    - sfz parser: allow -200 to 200 for pan_oncc opcode (#182)
    - added FLAC support (#191)
    - sfz parser bugfix: lines starting with whitespace were ignored
    - added amplitude opcode
    - added support for "#include" instruction
      (modified patch which was originally posted by Sergey on LS mailing list)
    - bugfix: generation of velocity curves etc should not be done
      after each "#include", only after the main file is parsed
    - bugfix: line numbers in error messages were wrong after "#include"
    - added support for float and 32 bit sample files

  * SoundFont format engine:
    - Initial implementation (not usable yet)
    - RT-safeness: avoid malloc in audio thread
    - fixed a bug that could cause voice stealing to fail
    - fine-tuned amplitude EG (by switching from gig to sfz EG)
    - initial implementation of Vibrato LFO and Modulation LFO
    - initial implementation of cutoff filter
    - use linear decay and release for filter and pitch EG

  * Host plugins (VST, AU, LV2, DSSI):
    - AU bugfix: failed to destroy its audio/MIDI devices
    - Listen to all interfaces on Mac OS X (INADDR_ANY)
    - VST bugfix: If the host called resume() before and after
      changing sample rate or block size, the number of channels was
      incorrectly set to two. This caused silence in Cubase 5.
    - save engine type (gig, sfz or sf2) in plugin state
    - VST: when opening Fantasia, look for both 32 and 64 bit Java on
      64 bit Windows
    - AU: changed number of output channels from one stereo to 16
      stereo
    - VST: made it possible to build the VST plugin for Mac
    - AU: link AU plugin dynamically if --disable-shared isn't
      specified
    - LV2 "state" extension support (patch by David Robillard)
    - VST bugfix: instrument loading hang and crashed the host when
      the plugin was loaded a second time (#174)
    - plugin bugfix: instrument loading hang when the plugin was
      loaded a second time (this time it's for Linux and Mac, previous
      similar fix was for Windows)
    - thread safety fixes for the instrument loading thread
    - LV2: use the new lv2 package if present
    - VST: try to open Fantasia automatically on Linux and Mac too (on
      Linux, the Fantasia jar should be placed in <prefix>/share/java)
    - VST: fixed crashes on Linux Ardour and EnergyXT
    - DSSI bugfix: it wasn't possible to change engine type. The MIDI
      port and audio channel routing for DSSI plugins are now visible.
    - LV2: use urid and atom extensions instead of deprecated uri-map
      and event
    - LV2: lv2 package 1.0 is now required to build the LV2 plugin
    - LV2: changed number of output channels to 16 stereo, just like
      the VST and AU plugins
    - LV2: fixed save/restore of SFZ state (patch by David Robillard)
    - LV2: made LV2 plugin buildable on Windows and Mac
    - VST: implemented retrieval and switching of programs using the
      sampler's internal MIDI instrument mapping system

  * Instrument editor interface:
    - Changed instrument editor plugin interface, providing additional
      informations like the EngineChannel for which the instrument editor was
      spawned for. This allows the instrument editors to interact more actively
      with the sampler.

  * MIDI driver:
    - ALSA MIDI driver supports now "NAME" device parameter, for overriding
      the ALSA sequencer client name
    - removed limit of maximum amount of MIDI ports per MIDI device, since
      there is no reason for this limit
    - MME: fixed memory handling bug found with cppcheck
    - MME: removed compiler warning
    - CoreMIDI: implemented driver specific port parameter "CORE_MIDI_BINDINGS",
      which allows to retrieve the list of CoreMIDI clients / ports and to connect
      to them a la JACK, via the usual sampler APIs
    - CoreMIDI: added driver specific port parameter "AUTO_BIND", if enabled
      the driver will automatically connect to other CoreMIDI clients' ports
      (e.g. external MIDI devices being attached to the Mac)
    - added support for MIDI note on velocity filter
    - CoreMIDI: fixed memory deallocation error
    - Fixed variable underflow in VirtualMidiDevice, which caused graphical
      virtual keyboards in frontends / instrument editors being stuck.
    - Bugfix in VirtualMidiDevice: process note on with velocity 0 as note off.
    - Implemented missing handling of MIDI "running status".
    - CoreMIDI fix: a MIDIPacket can contain more than one event per packet.
    - MME bugfix: driver wasn't closed properly
    - CoreMIDI: automatically connect to all input sources by default (driver
      parameter "AUTO_BIND").
    - CoreMIDI: fixed auto bind feature to CoreMIDI ports that go online
    - CoreMIDI: fixed minor memory leak

  * audio driver:
    - ASIO driver fixes for newer gcc versions (fix from PortAudio)
    - JACK audio: react on sample rate changes.
    - JACK audio: react on buffer size changes.
    - JACK audio: jack_port_get_buffer() was cached and called outside
      RT context.
    - ASIO driver: removed compiler warnings
    - CoreAudio: fixed minor error handling bug
    - ASIO driver: be more verbose when no ASIO card could be found (fixes #203)
    - JACK audio: return the JACK server's current sample rate as default value
      for audio device parameter "SAMPLERATE" (fixes #166).

  * LSCP server:
    - added support for sending MIDI CC messages via LSCP command
      "SEND CHANNEL MIDI_DATA CC <sampler-chan> <ctrl> <val>"
    - added LSCP command "GET AVAILABLE_EFFECTS"
    - added LSCP command "LIST AVAILABLE_EFFECTS"
    - added LSCP command "GET EFFECT INFO <effect-index>"
    - added LSCP command "CREATE EFFECT_INSTANCE <effect-index>"
    - added LSCP command
      "CREATE EFFECT_INSTANCE <effect-system> <module> <effect-name>"
    - added LSCP command "DESTROY EFFECT_INSTANCE <effect-instance>"
    - added LSCP command "GET EFFECT_INSTANCES"
    - added LSCP command "LIST EFFECT_INSTANCES"
    - added LSCP command "GET EFFECT_INSTANCE INFO <effect-instance>"
    - added LSCP command
      "GET EFFECT_INSTANCE_INPUT_CONTROL INFO <effect-instance> <input-control>"
    - added LSCP command "SET EFFECT_INSTANCE_INPUT_CONTROL VALUE
      <effect-instance> <input-control> <value>"
    - added LSCP command "GET SEND_EFFECT_CHAINS <audio-device>"
    - added LSCP command "LIST SEND_EFFECT_CHAINS <audio-device>"
    - added LSCP command "ADD SEND_EFFECT_CHAIN <audio-device>"
    - added LSCP command
      "REMOVE SEND_EFFECT_CHAIN <audio-device> <effect-chain>"
    - added LSCP command
      "GET SEND_EFFECT_CHAIN INFO <audio-device> <effect-chain>"
    - added LSCP command "APPEND SEND_EFFECT_CHAIN EFFECT <audio-device>
      <effect-chain> <effect-instance>"
    - added LSCP command "INSERT SEND_EFFECT_CHAIN EFFECT <audio-device>
      <effect-chain> <effect-chain-pos> <effect-instance>"
    - added LSCP command "REMOVE SEND_EFFECT_CHAIN EFFECT <audio-device>
      <effect-chain> <chain-pos>"
    - added LSCP command "SET FX_SEND EFFECT <sampler_channel>
      <fx_send_id> <effect_chain> <chain_pos>"
    - added LSCP command "REMOVE FX_SEND EFFECT <sampler_channel> <fx_send_id>"
    - added LSCP commands "SUBSCRIBE EFFECT_INSTANCE_COUNT",
      "SUBSCRIBE EFFECT_INSTANCE_INFO", "SUBSCRIBE SEND_EFFECT_CHAIN_COUNT",
      "SUBSCRIBE SEND_EFFECT_CHAIN_INFO"
    - provide comprehensive error messages on LSCP syntax errors
      (suggesting expected next non-terminal symbols)
    - Fixed client connection not being closed after network errors.

  * LSCP shell:
    - Added support for auto correction of obvious and trivial syntax mistakes.
    - Added support for auto completion by tab key.
    - Show currently available auto completion while typing.
    - Added support for browsing command history with up / down keys.
    - Show all possible next symbols immediately right to the current command
      line while typing (no double tab required for this feature, as it would
      be the case in other shells).
    - Added support for moving cursor left/right with arrow keys.
    - Added support for built-in LSCP reference documentation, which will
      automatically show the relevant LSCP reference section on screen as soon
      as one specific LSCP command was detected while typing on the command
      line.

  * Real-time instrument scripts:
    - Implemented built-in script array variable %CC.
    - Implemented built-in script int variable $CC_NUM.
    - Implemented built-in script int variable $EVENT_NOTE.
    - Implemented built-in script int variable $EVENT_VELOCITY.
    - Implemented built-in script constant variable $VCC_MONO_AT.
    - Implemented built-in script constant variable $VCC_PITCH_BEND.
    - Implemented execution of script event handler "init".
    - Implemented execution of script event handler "controller".
    - Implemented execution of script event handler "note".
    - Implemented execution of script event handler "release".
    - Implemented built-in script function "play_note()" (only two of the
      max. four function arguments are currently implemented yet though).
    - Implemented built-in script int variable $EVENT_ID.
    - Implemented built-in script function "ignore_event()"
    - Implemented built-in script function "ignore_controller()" (may have one
      or no argument).
    - Implemented built-in script function "set_controller()".
    - Added extended script VM for the Gigasampler/GigaStudio format sampler
      engine, which extends the general instrument script VM with Giga format
      specific variables and functions.
    - Giga format scripts: added built-in script int constant variables
      $GIG_DIM_CHANNEL, $GIG_DIM_LAYER, $GIG_DIM_VELOCITY, $GIG_DIM_AFTERTOUCH,
      $GIG_DIM_RELEASE, $GIG_DIM_KEYBOARD, $GIG_DIM_ROUNDROBIN, $GIG_DIM_RANDOM,
      $GIG_DIM_SMARTMIDI, $GIG_DIM_ROUNDROBINKEY, $GIG_DIM_MODWHEEL,
      $GIG_DIM_BREATH, $GIG_DIM_FOOT, $GIG_DIM_PORTAMENTOTIME, $GIG_DIM_EFFECT1,
      $GIG_DIM_EFFECT2, $GIG_DIM_GENPURPOSE1, $GIG_DIM_GENPURPOSE2,
      $GIG_DIM_GENPURPOSE3, $GIG_DIM_GENPURPOSE4, $GIG_DIM_SUSTAIN,
      $GIG_DIM_PORTAMENTO, $GIG_DIM_SOSTENUTO, $GIG_DIM_SOFT,
      $GIG_DIM_GENPURPOSE5, $GIG_DIM_GENPURPOSE6, $GIG_DIM_GENPURPOSE7,
      $GIG_DIM_GENPURPOSE8, $GIG_DIM_EFFECT1DEPTH, $GIG_DIM_EFFECT2DEPTH,
      $GIG_DIM_EFFECT3DEPTH, $GIG_DIM_EFFECT4DEPTH, $GIG_DIM_EFFECT5DEPTH.
    - Giga format scripts: Implemented built-in script function
      "gig_set_dim_zone(event_id, dimension, zone)".
    - Implemented built-in script int array variable %KEY_DOWN.
    - Implemented built-in script function "abs()".
    - Implemented built-in script function "random()".
    - Implemented built-in script function "num_elements()".
    - Implemented built-in script function "note_off()".
    - Implemented built-in script function "set_event_mark()".
    - Implemented built-in script function "delete_event_mark()".
    - Implemented built-in script function "by_marks()".
    - Added built-in script int const variables $MARK_1 to $MARK_28.
    - Built-in script functions "ignore_event()", "note_off()" and
      "gig_set_dim_zone()" now also accept an array of event IDs as argument
      (i.e. return value of new script function "by_marks()").
    - Pass/preserve polyphonic variable data from respective "note" event
      handler to "release" event handler.
    - Fixed crash when using built-in script function "by_marks()".

  * Bug fixes:
    - Fixed crash which may occur when MIDI key + transpose is out of range
    - minor valgrind fixes
    - fixed crash which occurred when changing an already deployed sampler
      channel to a different engine type
    - fixed crash when deleting a sampler channel or changing engine
      type while an instrument load was in progress
    - bugfix: playing a note while changing the instrument could cause
      a crash, or give "Handing back unknown region" error messages
    - bugfix: calling SET VOICES (which Fantasia does on start and
      refresh) could cause instruments to be unloaded
    - Mac OS X: fixed name collision of enum in EffectControl and
      wrong name of destructor in AudioOutputDeviceCoreAudio.cpp
    - Mac OS X: fixed hanging threads
    - Windows: disabled the previous thread fix on non-Mac systems, as
      it caused hanging threads on Windows
    - Fixed possible crashes due to corrupted MIDI/audio device list
      after MIDI/audio device creation failure
    - When creating MIDI instrument map entries with "PERSISTENT" type, the
      instruments were uselessly precached with zero samples, however it still
      took the full preloading time and on 1st program change the respective
      instrument was completely reloaded again.
    - fixed handling of rapid bank select and program change messages
      sent to the same sampler channel (patch from the Open Octave
      project, slightly adjusted)
    - fixed crash when trying to create an effect instance with controls
      which min and/or max values depend on the sample rate
    - fixed bug #162
    - bugfix: LADSPA_PATH was not evaluated correctly when containing
      multiple paths (#165)
    - thread safety fixes for the instrument loading thread
    - bugfix: instrument loading crashed for sfz and sf2 in Ardour
      (#176)
    - more thread safety fixes for the instrument loading thread
    - sfz/sf2 engine: fixed crash when using small audio fragment size
    - Mac OS X: fixed crash when unloading plugin on 10.7 and later
    - Mac OS X: fixed process hang when unloading 32-bit plugin (bug
      introduced in previous fix)
    - fixed crash when a channel received a program change while
      playing a note in a key group
    - fixed erroneous error message piping in VoiceBase.h
      (labelled "Disk stream not available in time")
    - Update effects on sample rate & period size changes (to avoid
      crashes and noise on such transitions).
    - ignore missing LADSPA paths without ignoring valid LADSPA paths
      (fixes #208)
    - Fixed bug in LSCP grammar definition which caused a statement like
      "GET SERVER INFOasdf\n" to be accepted as valid statement (was so far
      practically irrelevant, however it caused problems with the new LSCP
      shell's auto completion feature).
    - Fixed MIDI program change messages being ignored if quickly executed
      after each other (fixes #231).

Version 1.0.0 (31 July 2009)

  * packaging changes:
    - autoconf bugfix: the PKG_CONFIG variable wasn't initialized properly,
      causing e.g. the libgig test to fail when
      "./configure --disable-jack-driver" was used
      (patch by Alexis Ballier)
    - fixed compilation with gcc 4.3
    - fixes for building on OS X (thanks to Ebrahim Mayat for testing)
    - fixed configure so it detects x86_64 (#107)
    - fixes for building with newer MinGW versions
    - fix for building with bison 2.4 (#111)
    - fixed building with libgig installed in a non-standard directory
    - minor fix in configure for mmsystem.h detection on MinGW
    - Windows: look for editor plugins and Fantasia using base
      directory of liblinuxsampler dll (look in the same directory and one
      directory above)
    - configure script fix: removed unconditional use of SSE
    - fixed building with sqlite installed in a non-standard directory
    - when cross-compiling, don't try to create instruments.db
    - fix for new mingw-w64 version, which has usleep

  * general changes:
    - bugfix: on some POSIX systems instrument editor plugins refused to
      load as we used a non-portable Linux specific struct field
      (fixes bug #70, patch by Ronald Baljeu)
    - fixed endless loop which occured when loading an instrument editor
      plugin DLL on Windows systems failed
    - fixed memory leaks that occurred when liblinuxsampler was unloaded
    - optimized the SynchronizedConfig class so it doesn't wait
      unnecessarily long after an update
    - added support for notifying instrument editors on note-on / note-off
      events (e.g. to highlight the pressed keys on the virtual keyboard
      of gigedit)
    - added support for triggering notes by instrument editors (see above)
    - be verbose on DLL load errors (on Linux)
    - fixed di-harmonic triangle LFO implementation (this LFO implementation
      is only used by very few systems, most pick the int math
      implementation, which is usually faster)
    - fixes for audio drivers with varying buffer sizes
    - experimental support for running LinuxSampler as a DSSI, LV2 and
      VST plugin
    - notification events for stream/voice count statistics are now sent
      only when there are actual changes
    - added memory ordering constraints to improve stability on
      multi-core and multi-cpu systems
    - maximum voices and disk streams can now be altered at runtime
    - fixed CPU feature detection on x86_64 (maybe fixes #108)
    - automatic stacktrace mechanism is now turned off by default and can
      be switched on by command line option "--stacktrace" (the automatic
      stacktrace mechanism seems to be broken on most systems at the moment)
    - C++ API method InstrumentManager::LaunchInstrumentEditor() now returns
      a pointer to the launched InstrumentEditor object
    - added optional 3rd party user data parameter for following
      liblinuxsampler C++ API methods: InstrumentEditor::Main(),
      InstrumentEditor::Launch(),
      InstrumentManager::LaunchInstrumentEditor()
    - theoretical fix: made SynchronizedConfig follow C++0x memory
      model more strictly
    - fixes for using large audio device buffers
    - Windows: add the installation directory to the DLL search path
      when loading an editor plugin (solves problems with VST and
      gigedit on systems with other GTK versions installed)
    - updated linuxsampler man page

  * audio driver:
    - removed the nonsense audio channel constraint (which was hard coded to
      max. 100 audio channels) for most audio drivers
    - JACK audio driver did not offer a device parameter "SAMPLERATE" as
      opposed to the LSCP specs
    - bugfix: the SAMPLERATE parameter of some drivers (e.g. JACK)
      reflected the wrong value
    - fixed a memory management bug in ASIO driver
    - Makefile fix: JACK_CFLAGS wasn't used
    - JACK: use jack_client_open instead of the deprecated
      jack_client_new
    - added (experimental) CoreAudio driver
    - applied old fixes to the ASIO driver that were included in the
      previous binary release but accidentally never committed to CVS
      (fixes #117)
    - fixes for ASIO on mingw-w64 (iasio wrapper is not needed on
      win64)
    - VST: added support for sample rate and buffer size changes
    - VST: close editor (Fantasia) when the VST is removed
    - VST: avoid opening Fantasia more than once for each VST instance
    - VST: export main function as "main" on Linux too (fix for
      energyXT)
    - VST: changed number of output channels from one stereo to 16
      stereo
    - added channel routing, fxsends and midi maps to the settings
      stored in the plugin state
    - performance optimization of AudioChannel::MixTo() and
      AudioChannel::CopyTo() methods using GCC vector exensions
      (if available)
    - ASIO fixes: avoid initializing the device twice, avoid throwing
      exception when getting parameters from a disconnected device

  * MIDI driver:
    - added JACK MIDI driver
    - dispatch bank select as ordinary CC as well, the user might seriously
      want to (mis)use it for some purpose ("fixed" in all current MIDI
      input drivers: ALSA, CoreMIDI, JACK, MidiShare, MME)
    - bugfix: pitch bend wasn't working with JackMidi, VST, LV2, MME,
      CoreMidi or AU
    - fixed mingw-w64 compilation error in MME driver
    - made program change handling in MIDI thread real-time safe by
      moving the logic to a non-RT thread
    - fixed minor memory leak in ALSA driver

  * instruments database:
    - avoid time consuming samples scanning when adding instruments
      to the instruments database
    - added support for handling lost files in the instruments database
    - Implemented option for adding instruments in separate directories
      in the instruments database
      (patch by Chris Cherrett & Andrew Williams, a bit adjusted)
    - work-around for missing fnmatch function on Windows to make
      instrument database compilable
    - added instrument database support on Windows
      works with both standalone mode and VST plugin.
      the instruments DB file is located in
      %USERPROFILE%\.linuxsampler\instruments.db which allows different
      databases for each windows user
      if no DB is present it automatically creates the .linuxsampler subdir
      and then creates an empty DB
    - fixed recursive import, which was broken on Windows

  * Gigasampler format engine:
    - fixed a memory leak that could happen when a channel was deleted
      while notes were playing
    - made it possible to load an instrument even if the audio thread
      isn't running
    - added partial support for the "Controller Triggered" MIDI rule,
      enough for piano gigs with pedal noise samples
    - minor fix: only mark FX sends as being modified if really the
      respective FX send MIDI controller was used
    - added support for GM global device volume SysEx message
      (can be selected at compile time to either apply globally to the
      whole sampler [default] or only to the sampler channels that are
      connected to the respective MIDI input port the SysEx message arrived
      on)
    - bugfix: notes triggered at position 0 in the audio buffer were
      sometimes wrongly killed in the same buffer, causing no sound to
      be played
    - added support for chromatic / drumkit mode Roland GS Sysex message
      which is usally used to switch a part between chromatic sounds and
      drumkit sounds (as opposed to their common default setting of MIDI
      part 10 being a drumkit part and all other ones chromatic parts), in
      LS however one can switch between the first 16 MIDI instrument maps
      defined for the sampler
    - made it possible to create multiple sample channels even if the
      audio thread isn't running
    - fixed crash when removing channel with active voices (#116)
    - bugfix: on sample reference changes (instrument editor), only
      un-cache the respective sample if it's really not used by any
      sampler engine anymore
    - re-cache samples in case they were changed by an instrument editor,
      e.g. when a sample was added while playing (#82)
    - fixed hanging notes which occured when note-off event had the exact
      same time stamp as the voice's note-on event and occured both in the
      same audio fragment cycle (fixes bug #112)
    - added support for the "fine tune" and "pitch bend range"
      instrument-level gig parameters
    - fixed minor artifacts in pitch bend handling
    - added support for GS Reset SysEx message
    - allow gig files to use unlimited downward pitch shifting
    - added a limit check for upward pitch shifting
    - bugfix: sometimes, when playing a note twice fast, the second
      note was silent
    - fixed crash happening when a pitch bend event arrived at the
      same time a new instrument was loading

  * LSCP server:
    - added new LSCP event "CHANNEL_MIDI" which can be used by frontends to
      react on MIDI data arriving on certain sampler channels (so far only
      Note-On and Note-Off events are sent via this LSCP event)
    - added new LSCP event "DEVICE_MIDI" which can be used by frontends to
      react on MIDI data arriving on certain MIDI input devices (so far only
      Note-On and Note-Off events are sent via this LSCP event)
    - added new LSCP commands: FIND LOST DB_INSTRUMENT_FILES and
      SET DB_INSTRUMENT FILE_PATH
    - added new LSCP command: SEND CHANNEL MIDI_DATA which can be used by
      frontends to send MIDI messages to specific sampler channel
    - added two additional fields to GET FILE INSTRUMENT INFO command -
      KEY_BINDINGS and KEYSWITCH_BINDINGS
    - bugfix: the bank number provided by MIDI_INSTRUMENT_INFO notifications
      was incorrect
    - Optimized the retrieval of the MIDI instrument mappings
    - added new LSCP command "SET VOICES" to globally alter the maximum
      amount of voices, added new LSCP event "GLOBAL_INFO:VOICES" which will
      be triggered respectively
    - added new LSCP command "SET STREAMS" to globally alter the maximum
      amount of disk streams, added new LSCP event "GLOBAL_INFO:STREAMS"
      which will be triggered respectively
    - bugfix: retry if "select" returns EINTR (this fixes a crash when
      a gigedit file dialog is opened)
    - close all connections when LSCPServer is deleted
    - hard close of all sockets on exit
    - bugfix: SET CHANNEL MIDI_INPUT_TYPE didn't work with the MME
      driver

  * Bug fixes:
    - fixed a crash which occurs when removing a sampler channel waiting
      to start instrument loading after another channel
    - fixed a crash which occurs when removing a sampler channel with
      instrument loading in progress (bug #113)
    - fixed termination caused by uncaught exception when adding MIDI
      instrument with PERSISTENT load mode
    - fixed possible iterator invalidations when resetting the sampler
    - fixed memory leaks when issuing the following LSCP commands:
      GET AUDIO_OUTPUT_DRIVER INFO
      GET AUDIO_OUTPUT_DRIVER_PARAMETER INFO
      GET MIDI_INPUT_DRIVER INFO
      GET MIDI_INPUT_DRIVER_PARAMETER INFO
    - fixed possible compilation error when sqlite is not present
    - fixed orphaned pointers when setting maximum voices limit (bug #118)
    - fixed crash when changing the audio output device of a sampler
      channel with loaded instrument and start playing notes
    - fixed endless loop in Engine::SuspendAll() (bug #120)
    - fixed a low-level atomic load function that was broken on 64-bit
      PowerPC, which probably could cause crashes on that platform
    - fixed a memory management error which could cause a crash when a
      plugin was unloaded
    - bugfix: two private structs had the same name, which could cause
      problems if the linker chose the wrong constructor
    - fixed low-level ConditionServer usage bug that caused lockups on
      Windows


Version 0.5.1 (6 December 2007)

  * packaging changes:
    - added autoconf checks for pthread library
    - added autoconf check for pthread bug found on certain NPTL-enabled
      glibc versions (see Gentoo bug report #194076)
    - added autoconf checks for MS Windows

  * general changes:
    - bugfix: the thread used by an editor plugin didn't die when the
      editor closed
    - bugfix: Ringbuffer.h: fill_write_space_with_null() did not zero
      out all the space. operator--() did not apply size_mask after
      decrementing the read_ptr. DEFAULT_WRAP_ELEMENTS set to 0 in
      order to avoid problems with the _NonVolatileReader functions.
    - bugfix: Stream.h: added a missing divide by BytesPerSample in
      GetWriteSpace(). Since this function is currently only used in
      the stream's qsort() compare function, it didn't trigger any
      bugs.
    - Resampler.h, Synthesizer.h: cubic interpolation now works in
      24bit mode too. Faster method to read 24bit words on little
      endian machines (x86): replaced 3 byte reads + shifts with a 1
      unaligned 32bit read and shift
    - experimental support for MS Windows (MIDI input via MME, AUDIO
      output via ASIO)
    - made handling of SIGINT signal (Ctrl-C) a bit more robust
    - support for monitoring the total number of active disk streams
      (new LSCP commands: GET TOTAL_STREAM_COUNT,
      SUBSCRIBE TOTAL_STREAM_COUNT, UNSUBSCRIBE TOTAL_STREAM_COUNT)

  * AUDIO driver:
    - added Windows ASIO low latency audio driver

  * MIDI driver:
    - added MME Windows MIDI driver

  * LSCP server:
    - added support for Windows style path / filenames, however with
      forward slash path separators instead of backslash
      (i.e. "C:/foo/bar.gig")
    - allow naughty liblscp to send non-string device parameters within
      apostrophes as well
    - added new LSCP commands: "GET FILE INSTRUMENTS <file>",
      "LIST FILE INSTRUMENTS <file>" and
      "GET FILE INSTRUMENT INFO <file> <index>" for retrieving informations
      about an arbitrary instrument file on the system where the sampler is
      running on

Version 0.5.0 (15 October 2007)

  * packaging changes:
    - config.h is not going to be installed along with liblinuxsampler's
      API header files anymore
    - only the API relevant header (and source) files will be exported to
      the Doxygen API documentation (explicitly listed in Doxyfile.in)
    - added completely new XCode project files for Mac OSX which is now
      capable to execute our autoconf environment, thus no need anymore
      to maintain the compile time configuration file (osx/version.h) for
      OSX manually (patch by Toshi Nagata)
    - fixed buggy boolean --enable-foo / --disable-foo configure script
      parameters
    - global.h now only covers global definitions that are needed for the
      C++ API header files, all implementation internal global definitions
      are now in global_private.h
    - atomic.h is not exposed to the C++ API anymore
    - no need to include config.h anymore for using LS's API header files
    - fixed warnings in API doc generation

  * general changes:
    - replaced the old, confusing MIDI program change mechanism by a
      flexible MIDI instrument mapper which allows to map arbitrary
      (MIDI bank, MIDI program) pairs with arbitrary
      (engine type, instrument file, file index) triplets which will be
      loaded on the respective channel when such MIDI program change
      messages arrive, beside that, each entry allows to define a life-time
      strategy for the instrument, so the user can define whether the
      instrument should i.e. be permanently loaded (to be able to switch
      quickly among sounds) or i.e. loaded just on demand when the
      respective program change arrives (to safe RAM space), as well as a
      global volume factor for each entry, so the user can adjust the volume
      dynamic of his mapped instrument collection without having to modify
      the instrument files, also one can manage arbitrary amount of such
      MIDI instrument maps and assign each sampler channel individually
      a certain map, so that i.e. separation of normal instruments and
      drumkits is possible
    - new notification events for tracking changes to audio/MIDI devices,
      MIDI instrument maps, MIDI instruments, FX sends, global volume.
    - sampler was limited to load max. 200 instruments in the background
      due to a constant size RingBuffer FIFO which is now replaced by a
      dynamic (unlimited) size std::list FIFO
    - added FX sends, these allow to route audio signals to arbitrary audio
      output channels for being processed by external effect processors
      (i.e. jack-rack), the send levels are controllable via arbitrary MIDI
      controllers
    - global (sampler wide) volume can now be controlled at runtime
    - Implemented new, improved notification system
    - fixed compilation errors regarding OSX
      (patch by Toshi Nagata)
    - implemented instruments database
    - added support for escape sequences to the instruments database
    - added highly experimental support for on-the-fly instrument editing
      within the sampler's process (by using instrument editor plugins),
      you'll notice the new "Registered instrument editors:" message on
      startup, added a new LSCP command:
      "EDIT CHANNEL INSTRUMENT <sampler-channel>"
      to spawn a matching instrument editor for the instrument on the
      given sampler channel, the plugin path can be overridden at compile
      time with ./configure --enable-plugin-dir=/some/dir
    - added experimental code for synchronizing instrument editors hosted
      in the sampler's process to safely edit instruments while playing
      without a crash (hopefully) by either suspending single regions
      wherever possible or if unavoidable whole engine(s)
    - fixed several issues in fundamental "Thread" class: set scheduling
      policy and priority on thread level, set a minimum stack size for
      thread (TODO: a reasonable value yet to be tested), bugfix: non-RT
      threads simply inherited properties of starting thread instead of
      setting their own policy and priority
    - minor fix in our automatic stack trace mechanism on crashes, the
      main process did not wait for the stack trace process to finish
      its output
    - fixed some minor memory leaks
    - reenabled assembly features support, at the moment only for
      enabling a fast denormal FPU mode (x86 platforms supporting SSE2)
    - minor assembly fix in x86 features detection (don't use the PIC
      register, to avoid relocations in the text segment at runtime)
    - POSIX callback functions of Thread.h are hidden

  * MIDI driver:
    - dispatch bank select (MSB and LSB) messages

  * audio driver:
    - the ALSA audio output driver parameters now reflect the correct
      parameter value ranges for the respective selected sound card
      (patch by Till Wimmer, a bit fixed and extended)

  * Gigasampler format engine:
    - if a filter is used and EG2 finishes before EG1, let the voice
      die when EG2 has finished (this fixes a problem with clicks and
      voice starvation for some gigs)
    - playback is no longer disabled during instrument loading
    - all notes playing on a channel that changes its instrument keep
      playing with the old instrument until they get a note off
      command
    - EG fix: a release value of zero could cause noises or crash
    - handle MIDI coarse tuning messages (MIDI RPN #0 MSB #2 LSB)
    - EG fine tuning: when attack is zero the EG starts at a level
      above max sustain level, which means that there is a decay phase
      even if sustain is 100%
    - more EG fixes: the level could sometimes go below zero and cause
      noises or crashes
    - minor fix of EGDecay (patch by Toshi Nagata)
    - fixed compiler error when --enable-override-filter-type was
      supplied to the configure script (fixes #46)
    - disk thread: queue sizes are now proportional to CONFIG_MAX_STREAMS
      instead of a fix value
    - behavior fix: on MIDI CC# 65 (portamento on / off), 126 (mono mode),
      127 (solo mode) only kill voices if the respective mode really
      changed

  * LSCP server:
    - fixed compile time error for old Bison versions
      (i.e. v1.28 found on MacOS 10.4, patch by Toshi Nagata)
    - parser now supports extended ASCII character set
      (up to ASCII code 255, i.e. includes now umlauts and accents)
    - filename arguments in LSCP commands now allow to use escape
      sequences, that is directly literal as one of: \', \", \\, \n, \r,
      \f, \t, \v, or as octal ASCII code value like \132, or as hex ASCII
      code value like \xf2) (fixes bug #24)
    - the following LSCP commands now also support escape sequences for at
      least one of their text-based parameters (i.e. name, description):
      "ADD MIDI_INSTRUMENT_MAP", "MAP MIDI_INSTRUMENT",
      "SET MIDI_INSTRUMENT_MAP NAME", "SET FX_SEND NAME", "CREATE FX_SEND",
      "SET DB_INSTRUMENT_DIRECTORY NAME",
      "SET DB_INSTRUMENT_DIRECTORY DESCRIPTION", "SET DB_INSTRUMENT NAME",
      "SET DB_INSTRUMENT DESCRIPTION", "FIND DB_INSTRUMENTS",
      "FIND DB_INSTRUMENT_DIRECTORIES"
    - returns verbose syntax errors (line and column where syntax error
      occured, the unexpected character and the actually expected, possible
      character(s), the latter only if less than 5 possibilities)
    - made sure that LSCP syntax is not affected by gigedit locale
      settings
    - bugfix regarding strings parameter lists: all comma separated lists
      of strings were treated as being one string containing commas
      (fixes #57)

  * Bug fixes:
    - fixed crash occurring on certain LSCP scripts (Bug 39)
    - another thread safety fix for lscp "load engine" and "set
      channel audio output device"
    - fixed a crash which occurs when reassigning the same engine
      on a sampler channel with connected MIDI device
    - fixed a crash which occurs when changing the number of ports of a MIDI
      device connected to a sampler channel to number less then or equal
      to the index of the port to which the sampler channel is connected.
    - The previous bindings were not been disconnected when altering
      the ALSA_SEQ_BINDINGS parameter. Introduced a NONE keyword for
      unsubscribing from all bindings (e.g. ALSA_SEQ_BINDINGS=NONE).
    - The active stream/voice count statistic was incorrect.
    - notification events were not been sent for some sampler
      channel changes
    - added default min and max values to restrict the number of allowed
      audio output channels and MIDI input ports
    - the connection to the PCM interface is now closed when destroying
      an audio output device
    - files with slash in their path or filename could not be loaded

  * test cases:
    - updated and fixed (haven't been touched in a while)

Version 0.4.0 (24 November 2006)

  * packaging changes:
    - changed deprecated copyright attribute to license; added ldconfig
      to post-(un)install steps; added devel package for liblinuxsampler;
      to linuxsampler.spec (RPM)
    - install necessary development header files for allowing 3rd party
      applications to link against liblinuxsampler
    - liblinuxsampler's API documentation can be generated with 'make docs'
      (Doxygen required)
    - added benchmark to automatically detect the best triangle LFO
      implementation (currently either an integer math solution or a
      di-harmonic approximation), automatic detection can be overriden
      with --enable-signed-triang-algo=x and --enable-unsigned-triang-algo=x
      configure script argument though (mandatory for cross-compilation)
    - do not automatically pick optimized gcc flags if the user already
      provided some on his own (as CXXFLAGS)
    - added compile time option to disable processing of All-Notes-Off MIDI
      messages
    - added compile time options to allow disabling the various audio and
      MIDI drivers
    - fixed automatic GCC CPU switch detection on PPC
      (patch by Ebrahim Mayat)

  * Gigasampler format engine:
    - extensive synthesis optimization
      (reimplementation of EGs and LFO(s), removed synthesis parameter
      prerendering and the synthesis parameter matrix in general, splitting
      each audio fragment into subfragments now where each subfragment uses
      constant pitch and filter coefficients. The volume coefficient is
      linearly interpolated inside a subfragment, unless
      --disable-interpolate-volume is set.)
    - fine tuning of the EG modulation parameters
    - improved filter cutoff calculation by adding support for the
      following gig parameters: Cutoff freq (used when no cutoff
      controller is defined), Control invert, Minimum cutoff, Velocity
      curve and Velocity range. The keyboard tracking now scales
      cutoff frequency instead of resonance.
    - added support for gig parameter Resonance.
    - fixed bug in sysex handling (patch by Juan Linietsky)
    - added global volume attenuation of -9 dB (0.35f) to prevent clipping
      which can be overridden with --enable-global-attenuation
    - EG fixes: made the length of "attack hold" stage more
      accurate. Release stage can now start before attack stage
      ends. Cancel release didn't work when sustain was zero. Attack
      time now has a minimal value to prevent clicks.
    - fixed pitch changes larger than one octave
    - fixed EG3 (pitch envelope) synthesis which was neutral all the time
    - implemented portamento mode and solo mode (a.k.a 'mono mode'):
      all modes can be altered via standard GM messages, that is CC5 for
      altering portamento time, CC65 for enabling / disabling portamento
      mode, CC126 for enabling solo mode and CC127 for disabling solo mode
    - fine tuning of the curves for volume (CC7), pan (CC10 and gig
      parameter) and crossfade
    - added support for the "attenuation controller threshold" gig
      parameter
    - added smoothing of volume changes caused by control change
      messages
    - sample loop parameters are now taken from the DimensionRegion
      instead of the wave chunk
    - fixed keyswitching for v3 gigs with a number of keyswitch splits
      not equal to a power of two
    - reimplementation of the filter algorithm. The new filter is more
      accurate and supports all gig filter types, including bandreject
      and lowpass turbo.
    - real support for 24 bit samples - samples are not truncated to
      16 bits anymore
    - support for aftertouch (channel pressure, not polyphonic
      aftertouch)
    - LFO1 behaviour fixed (dampening from max volume instead of
      amplifying from 0)

  * LSCP server:
    - fixed application exit on broken pipe error (fixes bug #20)
    - fixed the notification messages delay due to lack of
      network activity (fixes bug #26)
    - fixed parser bug which occured on space(s) within device parameters
      (e.g. "SET AUDIO_OUTPUT_CHANNEL_PARAMETER 0 0 SOMEPARAM='foo bar'")

  * audio driver:
    - added aRts audio output driver (by no means RT safe)

  * MIDI driver:
    - fixed legacy sysex code which caused dispatching of MIDI SysEx
      messages several times instead of once
    - API extension for MIDI drivers which already supply exact time stamps
      for events (i.e. for offline rendering based MIDI drivers)
    - added checks for bad MIDI data

  * linuxsampler application:
    - show available sampler engine types on startup

  * general changes:
    - support for muting sampler channels and solo mode of the same, two new
      LSCP commands ("SET CHANNEL MUTE" and "SET CHANNEL SOLO") and two new
      fields ("MUTE" and "SOLO") for command "GET CHANNEL INFO" were
      introduced for this, the behavior is the same like on a mixer console
      (patch by Grigor Iliev, a bit adjusted). Also added configure option
      --enable-process-muted-channels which can be used to enable the
      processing of muted channels.
    - support for sostenuto pedal
    - support for monitoring the total number of active voices
      (new LSCP commands: GET TOTAL_VOICE_COUNT, GET TOTAL_VOICE_COUNT_MAX,
      SUBSCRIBE TOTAL_VOICE_COUNT, UNSUBSCRIBE TOTAL_VOICE_COUNT)
    - fixed some memory management errors
    - fixed some concurrency problems that could lead to crashes when
      LSCP commands were executed
    - fixed crash when instrument loading failed previously on the same
      sampler channel (fixes bug #36)

Version 0.3.3 (15 July 2005)

  * packaging changes:
    - fixed compilation with gcc 4.0

  * Gigasampler format engine:
    - LFO preprocessing was performed even though the respective LFO was
      disabled by the instrument patch (minor efficiency fix)
    - if period time of chosen audio device is too small (< MIN_RELEASE_TIME)
      for volume ramp downs in the same fragment (needed for current voice
      stealing implementation) then simply inform the user with a warning
      about possible click sounds and reduce the volume ramp down
      appropriately instead of cancelling the audio device connection

Version 0.3.2 (24 June 2005)

  * packaging changes:
    - updated autotools build files to compile on OS X
      (conditional compilation of CoreMIDI and MidiShare drivers)
    - hand-crafted assembly optimization code can be disabled with
      './configure --disable-asm' (definitely not recommended)
    - fixed 'make dist' rule to include all necessary files
    - require automake (>= 1.5) for 'make -f Makefile.cvs'
      (due to 'dist-bzip2' automake option)

  * Gigasampler format engine:
    - support for the gig parameters for "release velocity response" curves
    - fine tuning of the EGADSR envelope
    - volume of release triggered samples now depends on note-on velocity,
      note length and gig parameter "release trigger decay" instead of
      note-off velocity.
    - revised voice stealing
      (fixes crash and endless loop caused by voice stealing)
    - don't reset scale tuning on instrument or audio output device change
    - handle key group conflicts right at the beginning of each fragment
      instead of when the respective voice is actually launched
      (fixes undefined behavior if stolen voices belonged to a key group -
      this case was followed by a "killed voice survived" error message)
    - fixed minor issue with null/silence samples
      (those stole voices even though they don't need a voice at all which
      resulted in "voice stealing didn't work out" messages)
    - don't reset volume, pan, pitch and MIDI controller values on
      instrument or audio output device change

  * LSCP server:
    - fixed some crashes (patch by Grigor Iliev, fixes #19)
    - fixed LSCP event "CHANNEL_INFO" notification
      (e.g. did not notify on volume changes or MIDI program change events)

  * linuxsampler application:
    - added command line parameters --lscp-addr and --lscp-port to override
      default IP address and port of LSCP server

Version 0.3.1 (24 May 2005)

  * initial release