>> 2. I don't think outs1 or outs2 are opcodes.  For stereo, outs takes
>> two a-var's, so you could do:
>>


> Outs1 and outs2 are original Barry opcodes.
> Thi sshould work.  Can you view the waveform in Audacity (or similar) to
> see if us the sox playback or csound?

Hi,

outs1 and outs2 work like a charm with sox and ecasound.

now i have to solutions to do the job.
Thanks

Raoul