[PD] alsa and jack on ARM/Wandbaord

Chris Clepper cgclepper at gmail.com
Tue Sep 24 05:18:41 CEST 2013

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 at 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 at 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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