Re: [Jack-Devel] ALSA PCM multi plugin and xruns

On Sat, Dec 08, 2012 at 03:26:54PM -0600, Chris Caudle wrote:
> On Sat, December 8, 2012 5:57 am, Devin Anderson wrote:
> > This leads me to believe that the poll descriptors
> > indicate that there is data available on the master device,
> > but there isn't any data available on one of the other slave devices.
> 
> I don't remember hearing other people talk about this interface before. 
> Does the 3G version still use an Envy24 chip?
> Are you absolutely sure that the synchronization is set up correctly so
> that the cards are sharing word clock?  What you described sounds like
> what might happen if the clock sync starts slipping between two cards and
> they are not filling their buffers at a locked rate any more.

I see exactly the same symptoms with three ice1712 cards and pcm_multi.
My cards are modified to use a common clock oscillator hard wired to all
three cards, so there's no possibility of the clocks being unsynchronised.

John

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