On Wed, 2005-12-14 at 12:10 +1030, Jonathan Woithe wrote:
> Hi all
>
> I am currently working on an ALSA driver enhancement for a card which
> actually contains two seemingly sample-locked ADCs. I'm making the second
> ADC accessable via a second PCM interface attached to the card.
>
> In general things work fine - under OSS emulaion I can open both (one as
> /dev/dsp, the other as /dev/adsp). However, jackd doesn't seem to know
> or care about the second pcm interface on the card and I can't find any
> obvious way to tell jack about it. It seems suitable entries in .asoundrc
> might help but it's not clear to me that this will work without xruns
> (see http://www.alsa-project.org/alsa-doc/doc-php/asoundrc.php).
>
> Can jackd work with multiple PCMs from the same card, and if so, what's the
> best way?
Well, does the hardware have a mechanism to stop and start them in sync?
If so you could modify the driver to expose all the channels as a big
multichannel PCM like I did with the emu10k1 driver.
Lee
Received on Thu Dec 15 00:15:06 2005
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