• Merge several .wav file to one file named merged.wav:

  sox part1.wav part2.wav part3.wav merged.wav
  

• Convert .wav audio file to ALAC lossless file:

  ffmpeg -i audio.wav -acodec alac audio.m4a
  

• Convert .asf audio file to PCM wave file:

  mplayer -vo null -hardframedrop -ao pcm:file=audio.wav audio.asf
  

• Convert MIDI file to Ogg/Vorbis:

  timidity -Ov1S *.mid
  

• Extract the Right then Left channel of a stereo .wav file:

  sox stereo.wav -c 1 rightchan.wav avg -r
  sox stereo.wav -c 1 leftchan.wav avg -l
  

• Some sox compressor parameters:

  play audio.wav compand .1,.1 -60,-10 0 0 .1
  play audio.wav compand .01,.3 -6,-4,-3,-3,0,-3
  play audio.wav compand 0.3,1 -90,-90,-70,-70,-60,-20,0,0 -5 0 0.2
  

• Test Alsa audio driver output via gstreamer v0.10:

  gst-launch-0.10 audiotestsrc ! alsasink
  

• Generate cyclic pink noise (source):

  play -t sl -r48000 -c2 - synth -1 pinknoise tremolo .1 40 <  /dev/zero
  

• Generate background low frequency noise (source):

  play -c2 -n synth whitenoise band -n 100 24 band -n 300 100 gain +20
  

Other related ressources:

• Sox examples
• Audio Processing Pipelines