[LAU] PortAudio and Audacity+jack

[David Adler]

> I didn't explain my purpose for using Audacity.  I use it to play MP3 files, but also
> to change their tempo while preserving the pitch so I can learn drum and guitar parts
> for complicated riffs.  It's excellent for this purpose.  I've tried a few other tempo
> control apps before but they were excessively choppy.  It's been a while so if anyone
> can recommend one that works better than Audacity these days, I'd love to hear it.

good old mplayer again:

$ mplayer -af scaletempo -speed 0.7 file.mp3

speed can then be altered on the fly with [ ] and { }