sonic - Speech speed manipulator

Author

       Bill Cox waywardgeek@gmail.com Sonic Version 0.2, Copyright 2010, Bill Cox, Apache 2.0 license

                                                                                                        SONIC(1)

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.

Examples

sonic-s3.2book.wavbook_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-s0.5-v1.5spanish.wavspanish_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-p2.0low.wavhigh.wav

       This would make a low voice sound very high pitched.

Name

       sonic - Speech speed manipulator

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.

       -ppitch
              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.

       -rrate
              Adjust the speed of playback.  This scales both the pitch and speed equally.

       -sspeed
              Set speed up factor.  1.0 means no change, 2.0 means 2X faster.

       -vscaleFactor
              Scale volume by scaleFactor.  1.5 increases by 50%.  Clips if the maximum range is exceeded.