I think it might depend on the actual soundcard; coreaudio
supports the multiple opening of devices, but that depends
on the actual coreaudio driver. This is why portaudio
was not working originally in OSX, because it was trying
to open the device twice and so it failed. So far I have
not come across any driver that supports multiple opening
of soundcards.

Jack is certainly a good solution.

Victor

>
> Why is this true on OS X??  CoreAudio certainly supports
> any number of programs sending audio output
> simultaneously.
>
> Anthony Kozar
> anthonykozar AT sbcglobal DOT net
> http://akozar.spymac.com/
>
> Victor Lazzarini wrote on 11/4/05 2:41 PM:
>
> > The only thing to bear in mind is that each instance
> > will be competing for audio I/O resources. In certain
> > systems, ie. OSX, this will only be possible if each
> > instance is using a different soundcard.
>
> --
> Send bugs reports to this list.
> To unsubscribe, send email to
> csound-unsubscribe@lists.bath.ac.uk