multiple channels in pd

Miller Puckette mpuckett at man104-1.UCSD.Edu
Fri Jun 23 00:55:20 CEST 2000

Hi all, and sorry not to have offered something earlier about this...

If you have several soundcards (at least under OSS0 Pd will willingly open
them; each 2 channels you ask for on either input or output will cause Pd
to try to open another "device".  HOWEVER, if you don't have some way to
sync the cards together you'll have occasional clicks in the input and output
as Pd re-syncs them.  Most soundcards aren't syncable; however, you might be
able to get somewhere with a soldering iron.

The RME cards do work with Pd; I've had very good results from mine.  I've
only used 8 channels so far but theoretically you can go to 26, both in
and out.  You have to use a  special driver by Winfried Ritsch; the Pd
web page contains my re-packaging of this.  As far as I know the RME is the
ONLY tested multichannel solution for Pd.


On Thu, Jun 22, 2000 at 12:33:05PM +0100, Nick Fells wrote:
> "[L] matthias tarasiewicz" wrote:
> > 
> > how do i use multiple channels out of pd -- i am planning to use 2 or 3
> > soundcards and wanted to know if it is possible to use the different
> > dsps out of pd ... (linux)
> > any other ideas of using multichannel?
> > 
> > thankyou
> > 
> > mt
> Hi,
> Sorry, this is not exactly an answer to your question: in fact it's
> another related question.
> I seem to remember there is some experience among members of this list
> of the RME soundcards under Linux, and using them with PD.
> Has anyone successfully achieved multichannel i/o using an RME card and
> PD (Linux)? It seems to me one of the RME cards is probably the best way
> to go, in terms of h/ware spec and driver support, but if anyone has
> other ideas....
> At the University of Glasgow here we are interested in setting up a Pd
> box to do some sound spatialisation stuff. If anyone has any info or
> experience in this area, I'd be interested to share ideas/problems as
> we'd really like to get this going quickly.
> cheers,
> Nick
> -- 
> Dr Nick Fells,	
> Music Department,
> University of Glasgow,		Tel: +44 (0) 141-330 4096/6065
> Glasgow G12 8QQ			Fax: +44 (0) 141-330 3518
> UK.

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