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60 lines
1.8 KiB
60 lines
1.8 KiB
.TH SONIC 1
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.SH NAME
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sonic \- Speech speed manipulator
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.SH SYNOPSIS
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.B sonic [OPTION]... inFile outFile
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.SH DESCRIPTION
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Sonic is used to make wav files of speech faster or slower. The primary advance
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in sonic is the ability to speed speech up by much more than 2X, with minimal
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distortion. However, sonic can be used for both speeding up and slowing down
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speech files. Additionally, sonic can change the pitch and volume.
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.SH OPTIONS
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.TP
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.B \-c
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Modify pitch by emulating vocal chords vibrating faster or slower. This causes
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more distortion than the default pitch scaling, but sounds more like the same
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person trying to talk higher or lower. The default pitch changes makes the
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voice sound like a larger or smaller person, but introduces little distortion.
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.TP
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.B \-p pitch
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Set pitch scaling factor. 1.3 means 30%% higher.
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.TP
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.B \-q
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Disable all speed-up heuristics, possibly improving the quality slightly. This
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is mainly used for debugging the speed-up heuristics.
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.TP
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.B \-r rate
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Adjust the speed of playback. This scales both the pitch and speed equally.
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.TP
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.B \-s speed
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Set speed up factor. 1.0 means no change, 2.0 means 2X faster.
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.TP
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.B \-v scaleFactor
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Scale volume by scaleFactor. 1.5 increases by 50%. Clips if the maximum range is
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exceeded.
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.SH EXAMPLES
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.B sonic -s 3.2 book.wav book_fast.wav
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The above command would increase the speed of an audio book called book.wav by a
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factor of 3.2, and write the result in book_fast.wav.
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.B sonic -s 0.5 -v 1.5 spanish.wav spanish_slow.wav
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This would slow down the file spanish.wav by a factor of 2, make the volume 50%
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louder, and write the result to spanish_slow.wav.
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.B sonic -p 2.0 low.wav high.wav
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This would make a low voice sound very high pitched.
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.SH AUTHOR
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Bill Cox waywardgeek@gmail.com
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.BR
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Sonic Version 0.2, Copyright 2010, Bill Cox, Apache 2.0 license
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