yes, I've heard that alsa has the ability to create a single, "virtual sound card" from multiple individual cards, but so far I haven't been able to make this work - I'm interested though, to hear from anyone who has done it. also heard a rumor that new versions of jack may be able to connect to multiple cards at the same time - again, I don't have specific info, but am curious to hear if anyone has done it.

to find the post online about wiring the clocks together from multiple sound cards, google: el cheapo howto

-Dave M.

On 9/17/07, Tim Blechmann <tim@klingt.org> wrote:
actually, i have never done it, but wouldn't you have to link the clocks
of both audio devices in order to avoid timing problems?

wini one told me that one can combine devices with alsa, which includes
some code, that actually synchronizes multiple audio-devices by
software, which includes resampling in order to avoid timing
problems ...
iirc, pd doesn't include such error correction, so it might be a source
of unwanted audio dropouts ...

best, tim

On Mon, 2007-09-17 at 09:06 -0400, David Merrill wrote:
> I have only done this in Linux, but here are some thoughts:
>
>  - are your device numbers *really* 2 and 13? In my experience, they
> start at 1, and are numbered sequentially, meaning that you'd have to
> have a lot of sound cards in your system to get all the way up to 13.
>  - when you list channels, you typically give a number of channels for
> each sound device that you're using, and I always list in and out
> separately, as in:
>
> -audiodev 1,2 -inchannels 2,2 -outchannels 2,2
> (meaning that I'm using devices 1 and 2, and each one has 2 ins and 2
> outs)
> -David M.
>
> On 9/16/07, Joćo Miguel Pais <jmmmpais@googlemail.com > wrote:
>         Hi,
>
>         I wanted to use two soundcards for input, my built-in stereo
>         soundmax and
>         an rme multiface (for output only the rme). I tried the
>         following
>         parameters,
>
>         asio
>         audioindev 2,13 (2 is soundmax, 13 the rme)
>         audiooutdev 12
>         channels 18
>         audiobuf 40
>
>         but it didn't work, only one device was taken by pd, the rme.
>         Is it
>         possible in windows to have 2 different soundcards working?
>
>
>         Thank you,
>
>         Joćo Miguel Pais
>
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http://tim.klingt.org

Nothing exists until or unless it is observed. An artist is making
something exist by observing it. And his hope for other people is that
they will also make it exist by observing it. I call it 'creative
observation.' Creative viewing.
  William S. Burroughs




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