[PD] alsa and jack on ARM/Wandbaord

Chris Clepper cgclepper at gmail.com
Sun Sep 22 22:33:43 CEST 2013

Hi Katja

This is a pretty basic device with just hw0:0 for capture and playback, but
I will double check the mixer settings.

Someone from Freescale has been in touch and it looks like either a driver
issue (fixable) or errata on the board (not fixable).

I might try a USB audio device.  Anyone know what ones work with ARM?


On Sun, Sep 22, 2013 at 4:00 PM, katja <katjavetter at gmail.com> wrote:

> Hello Chris,
> It may be unrelated but with Debian Squeeze on particular Intel laptops
> (Panasonic CF-74 and CF-19) I've always experienced that same problem:
> recording works, playback works, but no duplex sound from Pd or Jack out of
> the box. In these cases it was a matter of unchecking as many unused
> options as possible in the ALSA mixer, in particular 'IEC958 Default PCM'
> (don't know if you have that option). That used to make the difference
> every time though I still don't know why.
> Katja
> On Sun, Sep 22, 2013 at 9:00 PM, Chris Clepper <cgclepper at gmail.com>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.  Pd's performance with just playback is pretty good
>> - pvoc example takes 20% cpu at 10ms latency - but I want to process some
>> audio input!
>> I built my own armhf kernel (much faster than armel) and have a very
>> basic Ubuntu filesystem in place.  There's no obvious process like
>> pulseaudio grabbing the audio hardware either.  Jack has all of the
>> limits.conf set high.
>> The audio device is sgtl5000 from Freescale.
>> What's the usual setup and troubleshooting process for Pd on Linux these
>> days?  Seems like these things are mostly sorted on x86, so maybe the
>> problem is driver or armhf related.
>> Thanks!
>> *Dual Cortex A9 box for $100: http://wandboard.org/
>> _______________________________________________
>> Pd-list at iem.at mailing list
>> UNSUBSCRIBE and account-management ->
>> http://lists.puredata.info/listinfo/pd-list
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.puredata.info/pipermail/pd-list/attachments/20130922/9676eb53/attachment.htm>

More information about the Pd-list mailing list