Manipulating WAV files

[Federico Voges]

David A. Bandel wrote:
> Folks,
> 
> Anyone know of a good, easy-to-use program to manipulate .wav files
> (or ulaw or alaw or gsm -- but I can convert between these easily
> enough)?
> 
> What I need to do:
> normalize sound (volume)
> add or remove silence to/from beginning or end of sound byte (usually
> remove from end)
> speed up or slow down (optional)
> 
> This is for an IVR (interactive voice recording) for Asterisk.
> 
> Thanx,
> 
> David A. Bandel


I can't remember which command line tool did that. But I've just been 
using Audacity (graphical, multiplatform: 
http://audacity.sourceforge.net/) this weekend to do pretty much what 
you need (except the ulaw/alaw/gsm part but you probably already know 
other tools to transcode the audio files :D).

The stuff that wasn't obvious (at least to me) was well documented on 
their twiki tutorials.

HTH

Cheers,
Fed.