Manipulating WAV files

[David A. Bandel]

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
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