[PD] Multiple audio devices limited to four devices?

[Miller Puckette]

hmm... "grep 4 *.c" didn't seem to help when I tried it.  Anyhow, I
found two places that would have to change: in s_stuff.h:

#define MAXAUDIOINDEV 4
#define MAXAUDIOOUTDEV 4

and in s_audio_oss.c:

#define OSS_MAXDEV 4            /* maximum number of input or output devices */

On a somewhat related note, you'l eventually get sync errors between the
devices unless you can find a way to hard-sync them.  If I were trying it,
I'd just phase-lock the crystals by connecting the five (or N) together
in parallel.  Worst that could happen is I'd have to buy 5 more interfaces :)

M

On Fri, Jul 17, 2009 at 04:28:38PM +0200, Martin Schied wrote:
> Hi!
> 
> I'm trying to use five (or more) ultra-cheap stereo-USB-speakers 
> together. Four of them are working when starting pd with
> 
> /usr/bin/pd -rt -oss -audiooutdev "2,3,4,5,6" -outchannels "2,2,2,2,2" 
> multiaudiotest.pd  
> 
> when looking into media, audio-settings dialog, only the first four of 
> them are visible and also only these four are usable for output.
> 
> this is with Pd version 0.41-4extended, ubuntu-intrepid and also pd 
> 0.42.5. I assume this is a hard coded limit which can be changed - but I 
> don't know where...
> 
> cheers,
> Martin
> 
> 
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