audio >> Audio
Record and play
 sound 
 soundsc 
 speak 
 recordsound 
 wavrecord 
 soundcap 
 aurecord aucapture
 loadaudio saveaudio playaudio record setaudio
Read and write
 auload ausave 
 wavwrite 
 wavread 
 readsnd 
 writesnd 
Process
 mu2lin 
 lin2mu
 auplot
 au