From: "cochedelaferte" 
> If am.csd right compiles with Orch, it must produce sound because there is
> really a sound inside, and that without any extra opcode lib. I suppose 
> that
> you have tried to save it to disk as .wav and saw what happens with any
> sound reader ?

Right, I ran csound -o test.wav W am.csd

There were no errors and I got a file test.wav, 30 seconds of silence, 
roughly, unless the sound is really high pitch and goes beyond my hearing 
range or something. I could send the wav or compress the file, but as far as 
I can tell it's complete silence.

--David.