From: schaefer@alphanet.ch   
      
   Jay Hennigan  wrote:   
   >> You could then adapt the sox command line for your needs.   
   >   
   > Not quite. The tones alternate at 20 pulses per second, not   
   > simultaneously. 1336 for 50ms, then 1800 for 50 ms, then 1633 for 50   
   > ms, etc.   
      
   Just once:   
      
   sox -V -r 48000 -n -b 16 -c 2 imts-disconnect.wav \   
      synth .05 sine 1336 vol -10db \   
      : synth .05 sine 1800 vol -10db \   
      : synth .05 sine 1633 vol -10db   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)