wav is a dead-simple API for dealing with WAV audio files.
I have created many examples in the form of command line utilities. These utilities are as follows:
- wav-crop - cut a WAV file
- wav-duration - get the duration of a WAV file
- wav-gradient - fade in/out a WAV file
- wav-overlay - play one WAV file on top of another one
- wav-tone - generate a sinusoidal tone at a given frequency
- wav-volume - change the volume of a WAV file
Full documentation is here