sox translates sound samples between different file formats,
and performs various sound effects.

This release understands "raw" files in various binary formats,
raw textual data,
Sound Blaster .VOC files, IRCAM SoundFile files, SUN Sparcstation 
.au files, mutant DEC .au files, Apple/SGI AIFF files, 
CD-R (music CD format), Macintosh HCOM files, Sounder files, 
NeXT .snd files, SUN ADPCM (compressed) .au files,
and Soundtool (DOS) files.

The sound effects include changing the sample rate, adding echo 
delay lines, applying low-, high, and band-pass filtering, 
reversing a sample in order to search for Satanic messages,
and the infamous Fender Vibro effect.

WWW: http://home.sprynet.com/~cbagwell/sox.html