| .TH SONIC 1 |
| |
| .SH NAME |
| sonic \- Speech speed manipulator |
| |
| .SH SYNOPSIS |
| .B sonic [OPTION]... inFile outFile |
| |
| .SH 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. |
| |
| .SH OPTIONS |
| .TP |
| .B \-p pitch |
| Set pitch scaling factor. 1.3 means 30%% higher. |
| .TP |
| .B \-q |
| Disable all speed-up heuristics, possibly improving the quality slightly. This |
| is mainly used for debugging the speed-up heuristics. |
| .TP |
| .B \-r rate |
| Adjust the speed of playback. This sales both the pitch and speed equally. |
| .TP |
| .B \-s speed |
| Set speed up factor. 1.0 means no change, 2.0 means 2X faster. |
| .TP |
| .B \-v scaleFactor |
| Scale volume by scaleFactor. 1.5 increases by 50%. Clips if the maximum range is |
| exceeded. |
| |
| .SH EXAMPLES |
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| .B 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. |
| |
| .B 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. |
| |
| .B sonic -p 2.0 low.wav high.wav |
| |
| This would make a low voice sound very high pitched. |
| |
| .SH AUTHOR |
| Bill Cox waywardgeek@gmail.com |
| .BR |
| Sonic Version 0.1, Copyright 2010, Bill Cox, GPL license |
