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<glossary id="glossary"><title>Glossary</title> |
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<glossdiv><title>A</title> |
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<glossentry id="gloss_adsr"><glossterm>ADSR</glossterm> |
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<acronym>ADSR</acronym> |
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<glossdef> |
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<para> |
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Attack, Decay, Sustain, Release, abbreviation for the so called |
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ADSR-envelope that forms a shape which controls voltage controlled |
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circuits like amplifiers or filters. |
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</para> |
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<glossseealso otherterm="gloss_attack">Attack</glossseealso> |
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<glossseealso otherterm="gloss_decay">Decay</glossseealso> |
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<glossseealso otherterm="gloss_envelope">Envelope</glossseealso> |
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<glossseealso otherterm="gloss_sustain">Sustain</glossseealso> |
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<glossseealso otherterm="gloss_release">Release</glossseealso> |
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</glossdef> |
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</glossentry> |
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<glossentry id="gloss_attack"><glossterm>Attack</glossterm> |
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<glossdef> |
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<para>time value, time span defined for an |
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envelope to rise after starting the envelope cycle</para> |
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<glossseealso otherterm="gloss_adsr">ADSR</glossseealso> |
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</glossdef> |
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</glossentry> |
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</glossdiv> |
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<glossdiv><title>D</title> |
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<glossentry id="gloss_decay"><glossterm>Decay</glossterm> |
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<glossdef> |
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<para>time value, time span defined for an |
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envelope to fall after rising to a hold state</para> |
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<glossseealso otherterm="gloss_adsr">ADSR</glossseealso> |
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</glossdef> |
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</glossentry> |
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</glossdiv> |
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<glossdiv><title>E</title> |
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<glossentry id="gloss_envelope"><glossterm>Envelope</glossterm> |
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<glossdef> |
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<para> |
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Definition of time and level values to shape a |
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signal. Most common structure is a so called |
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ADSR-follower. Such an envelope has a rising |
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Attack-time, a first falling Decay time leading |
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to the Sustain level. At the end of the cycle |
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there's a Release time, damping the signal's |
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strength. For example a piano has a rather |
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short Attack time, no Sustain level and |
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a Release time. Strings have varying Attack |
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times as well as varying Decay, they have a |
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Sustain level and very flexible Release time. |
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</para> |
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<glossseealso otherterm="gloss_adsr">ADSR</glossseealso> |
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</glossdef> |
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</glossentry> |
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</glossdiv> |
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<glossdiv><title>L</title> |
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<glossentry id="gloss_lfo"><glossterm>LFO</glossterm> |
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<glossdef> |
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<para> |
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Low Frequency Oscillator, an oscillator with very |
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low frequency, typically below 10Hz. Often used |
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with VCAs or VCFs to shape a signal. |
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</para> |
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<glossseealso otherterm="gloss_vca">VCA</glossseealso> |
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<glossseealso otherterm="gloss_vcf">VCF</glossseealso> |
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</glossdef> |
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</glossentry> |
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</glossdiv> |
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<glossdiv><title>R</title> |
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<glossentry id="gloss_release"><glossterm>Release</glossterm> |
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<glossdef> |
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<para>time value, time span defined for an |
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envelope to fall at the end of an envelope cycle</para> |
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<glossseealso otherterm="gloss_adsr">ADSR</glossseealso> |
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</glossdef> |
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</glossentry> |
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</glossdiv> |
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<glossdiv><title>S</title> |
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<glossentry id="gloss_sustain"><glossterm>Sustain</glossterm> |
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<glossdef> |
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<para>strength or level value, level of an |
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envelope while being in hold state of an envelope cycle</para> |
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<glossseealso otherterm="gloss_adsr">ADSR</glossseealso> |
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</glossdef> |
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</glossentry> |
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</glossdiv> |
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<glossdiv><title>V</title> |
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<glossentry id="gloss_vca"><glossterm>VCA</glossterm> |
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<glossdef> |
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<para> |
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Voltage Controlled Amplifier, an amplifier whose amplification |
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depends on a controlling voltage. Instead of making it louder |
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by turning a knob you raise the controlling voltage. Often |
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used in conjunction with Envelopes or LFOs to shape a signal. |
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</para> |
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<glossseealso otherterm="gloss_envelope">Envelope</glossseealso> |
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<glossseealso otherterm="gloss_lfo">LFO</glossseealso> |
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<glossseealso otherterm="gloss_vcf">VCF</glossseealso> |
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</glossdef> |
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</glossentry> |
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<glossentry id="gloss_vcf"><glossterm>VCF</glossterm> |
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<glossdef> |
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<para> |
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Voltage Controlled Filter, a filter whose parameters, |
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for example cutoff frequency, depend on a controlling voltage. |
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Instead of changing the frequency by turning a knob you raise the |
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controlling voltage. Often used in conjunction with Envelopes or |
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LFOs to shape a signal. |
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</para> |
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<glossseealso otherterm="gloss_envelope">Envelope</glossseealso> |
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<glossseealso otherterm="gloss_lfo">LFO</glossseealso> |
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<glossseealso otherterm="gloss_vca">VCA</glossseealso> |
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</glossdef> |
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</glossentry> |
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</glossdiv> |
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</glossary> |
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