NAME¶
sonic - Speech speed manipulator
SYNOPSIS¶
sonic [OPTION]... inFile outFile
DESCRIPTION¶
Sonic is used to make wav files of speech faster or slower. The primary advance
in sonic is the ability to speed speech up by much more than 2X, with minimal
distortion. However, sonic can be used for both speeding up and slowing down
speech files. Additionally, sonic can change the pitch and volume.
OPTIONS¶
- -c
- Modify pitch by emulating vocal chords vibrating faster or slower. This
causes more distortion than the default pitch scaling, but sounds more
like the same person trying to talk higher or lower. The default pitch
changes makes the voice sound like a larger or smaller person, but
introduces little distortion.
- -p pitch
- Set pitch scaling factor. 1.3 means 30%% higher.
- -q
- Disable all speed-up heuristics, possibly improving the quality slightly.
This is mainly used for debugging the speed-up heuristics.
- -r rate
- Adjust the speed of playback. This sales both the pitch and speed
equally.
- -s speed
- Set speed up factor. 1.0 means no change, 2.0 means 2X faster.
- -v scaleFactor
- Scale volume by scaleFactor. 1.5 increases by 50%. Clips if the maximum
range is exceeded.
EXAMPLES¶
sonic -s 3.2 book.wav book_fast.wav
The above command would increase the speed of an audio book called book.wav by a
factor of 3.2, and write the result in book_fast.wav.
sonic -s 0.5 -v 1.5 spanish.wav spanish_slow.wav
This would slow down the file spanish.wav by a factor of 2, make the volume 50%
louder, and write the result to spanish_slow.wav.
sonic -p 2.0 low.wav high.wav
This would make a low voice sound very high pitched.
AUTHOR¶
Bill Cox waywardgeek@gmail.com Sonic Version 0.1, Copyright 2010, Bill Cox, GPL
license