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Contents of /libgig/trunk/man/gig2stereo.1.in

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Revision 2693 - (show annotations) (download)
Tue Jan 6 15:48:59 2015 UTC (9 years, 1 month ago) by schoenebeck
File size: 5017 byte(s)
* Bug fix in "gig2stereo" command line tool, and added an additional
  option "--incompatible" for this tool.
* Bumped version (v3.3.0.svn24).

1 .TH "gig2stereo" "1" "06 Jan 2015" "libgig @VERSION@" "libgig tools"
3 gig2stereo \- Converts Gigasampler (.gig) files from mono pairs to true stereo.
5 .B gig2stereo
8 Takes a list of Gigasampler (.gig) files and / or directories as argument(s) and
9 converts the individual Gigasampler files from two separate mono sample pairs to
10 true stereo interleaved format. Given directories are scanned for .gig files.
11 The Gigasampler files are directly modified, not copied. Since at this point the
12 Gigasampler format only defines mono and stereo samples, this program currently
13 also assumes all samples in the .gig files provided to be either mono or stereo.
15 Background: The Gigasampler/GigaStudio format allows to create stereo
16 instruments in two ways: either by referencing true stereo (interleaved) samples
17 in the instruments, or by referencing a pair of (two) mono samples. Unfortunately
18 LinuxSampler does not support the latter at the moment, thus if a gig instrument
19 uses mono sample pairs, you will still hear it in mono. This tool was created to
20 circumvent this issue by allowing to convert gig files to using real stereo
21 (interlaved) samples instead. And even if LinuxSampler would add support for
22 mono sample pairs, it would be less efficient than using real stereo samples,
23 both concerning disk streaming as well as DSP processing after streaming input.
25 After conversion, you will find all newly created true stereo samples in
26 separate new sample group(s), which will be postfixed with " STEREO" in their
27 group names. So you should easily be able to distinguish the newly created true
28 stereo samples (i.e. when editing the .gig file with
29 .BR gigedit (1)
30 ) from old samples. Also, if the original (now replaced) mono samples were
31 postfixed with a channel indicator in their sample names
32 (i.e. "Spiccato D3 -L"), the new stereo samples will have a similar sample name,
33 but without such an audio channel indicator at the end of their names. Thus in
34 the mentioned example, the newly created stereo sample would be named
35 "Spiccato D3" instead.
37 .TP
38 .B \ FILE_OR_DIR1
39 Gigasampler (.gig) filename or directory
40 .TP
41 .B \ FILE_OR_DIR2
42 Gigasampler (.gig) filename or directory
43 .TP
44 .B \ --force-replace
45 Force replacing any found old mono sample reference by the new true stereo
46 samples. By default certain references of the old mono samples are not replaced
47 by new true stereo samples, usually because the respective old mono reference is
48 been used in an instrument context that seems to be entirely a mono use case,
49 not stereo, and thus replacing the mono sample reference by stereo ones might
50 not be intended for the respective instrument. Because there might indeed be
51 instruments in the same .gig file which are designed as explicit mono variant
52 (i.e. to allow the musician to save resources while playing, or for live
53 mix-down reasons, which are usually mono on live venues). By using
54 --force-replace all those old mono sample references in question will also be
55 replaced by the new stereo sample references.
56 .TP
57 .B \ --incompatible
58 Also match incompatible mono samples as pairs. By default, when searching for
59 potential mono samples that could be combined to true stereo samples, some
60 sanity checks are performed. Thus if two mono samples have completely different
61 characterstics (i.e. different fine tune setting, different loop types) then
62 they are by default considered to be incompatible and will not be merged to a
63 true stereo sample to avoid undesired audible errors in the modified file. Under
64 certain circumstances you might want to circumvent this sanity check, for
65 instance when you think that few cents fine tuning difference in the mono
66 samples are no reason for you to not merge them into a stereo sample. In this
67 case you can use this option to force the conversion. However certain
68 fundamental incompatibilities are still not ignored, even if you use
69 --incompatible, for example if the two mono samples have different bit depth,
70 sample rate or loop start and loop end points, in such cases those mono samples
71 will still not be merged to stereo samples, because the actual result of the
72 merge under that condition will certainly not be desired.
73 .TP
74 .B \ --keep
75 Keep old mono samples. By default old converted mono samples, if they are not
76 referenced by any instrument anymore, will automatically be deleted after
77 conversion. By using this argument it will preserve all of the old mono samples.
78 .TP
79 .B \ -r
80 Recurse through subdirectories.
81 .TP
82 .B \ -v
83 Print version and exit.
84 .TP
85 .B \ --verbose [LEVEL]
86 Be verbose and print additional informations while converting. The additional
87 numeric argument is optional, it allows to define the verbosity level
88 (1 .. 2, default: 1).
91 .BR gig2mono(1),
92 .BR gigextract(1),
93 .BR gigdump(1),
94 .BR gigmerge(1)
96 .SH "BUGS"
97 Check and report bugs at http://bugs.linuxsampler.org
98 .SH "Author"
99 Application and manual page written by Christian Schoenebeck <cuse@users.sf.net>

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