[ardour-dev] Multiple Soundcards?

Mark Knecht markknecht at gmail.com
Tue Apr 10 14:47:47 PDT 2007

I believe you can do this if you are a smart Alsa user. I've tried it
and failed. There would be a couple of steps:

1) Both RME cards are installed. One acts as a clock master and the
other as a slave. For whatever clock method you choose - probably word
clock but it could be ADAT or spdif - it won't matter - you need to
have a cable going between the two cards to transmit the clock from
the master to the slave.

2) You then need to build a 'virtual' sound card in asoundrc. Google
alsa virtual sound card for more info. Here's one, but not the best,


   Once you have the virtual sound card you should be able to access
it in QJC. If the cards are HDSP based you would probably need to run
two copies to see all the mixer channels and you cannot route audio in
hardware between the two cards.

Hope this helps,

On 4/10/07, Dan Tepper <dan at wintaper.com> wrote:
> I looked into netjack - but I am still confused.
> I want to put 2 RME cards in the same machine and see all the inputs in
> Ardour/JACK. One card has 24 inputs, the other has 8 - I would like to
> see all 32 inputs. Is this possible?
> Kjetil S. Matheussen wrote:
> >
> > On Tue, 10 Apr 2007, Dan Tepper wrote:
> >
> >> Is it possible to use multiple soundcards simultaneously with
> >> JACK/Ardour? I have an RME HDSP 9652 which gives me 24 channels but I
> >> may need up to 32 for a project I am doing. I have an RME Digi96/PAD
> >> that has 8 inputs and can be synced to external WC - I was thinking
> >> about adding that for the additional inputs. Can this be done?
> >> -Dan Tepper
> >
> > Yes, it can be done, and the question has been asked xx times before.
> > The short version of the answer is: Use the alsa client in the netjack
> > package. The even shorter (but more complete) answer is: Search the
> > archives.
> >
> > Sorry for the harshness. ;-)
> >
> > _______________________________________________
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> > ardour-dev at lists.ardour.org
> > http://lists.ardour.org/listinfo.cgi/ardour-dev-ardour.org
> >
> >
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