  analyze - frequency plot of a sound signal
  auread - load .au sound file
  auwrite - writes .au sound file
  lin2mu - linear signal to mu-law encoding
  loadwave - load a sound <<wav>> file into scilab
  mapsound - Plots a sound map
  mu2lin - mu-law encoding to linear signal
  playsnd - sound player facility
  savewave - save data into a sound <<wav>> file.
  sound - sound player facility
  wavread - load .wav sound file
  wavwrite - writes .wav sound file