Yup, that was it.  I had to get some Freescale guys to fix some kernel code and the fixes should filter out into the various branches and repos over time.  I think I'm one of two people that have functioning audio on the iMX6 platform right now.  It's like having a stack of Pi's in terms of processing (no video acceleration though).


On Mon, Sep 23, 2013 at 12:50 PM, Chris Clepper <cgclepper@gmail.com> wrote:
Looks like it is a driver issue in the kernel preventing duplex audio with the onboard sgtl5000.  I'm about to rebuild the kernel to test.


On Mon, Sep 23, 2013 at 2:25 AM, IOhannes m zmölnig <zmoelnig@iem.at> wrote:
On 09/22/13 21:00, Chris Clepper wrote:
> I've got a Wandboard* here for some testing and I can't get Alsa to work in
> duplex.  Testing with arecord produces a soundfile and aplay plays it back.
>  But starting Pd with Alsa or jack gives the dreaded errors about the
> resource being in use.

i did some tests with the wandboard and an external USB soundcard, and i
*never* managed to get jackd running stable for "longer" (the project
required that audio would work for days and weeks without restart).
so i ended up using a complicated (compared to jack) plugin system based
on ALSA.
it turned out that the timing on the wandboard is much too imprecise for
jack (and the connected cheapo USB-soundcard did not help)

obviously this is not the problem you are facing here (as i did get full
duplex sound), but maybe this info is of some other use...

fgmasdr
IOhannes


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