Re: [Jack-Devel] ARM JACK2 probs

On 05/27/2013 07:07 PM, Dan MacDonald wrote:
<snip>
>
> I have a few USB audio devices but the first I tried with JACK on my
> Pandaboard was my Philips portable hifi. Running JACK @ 48000/1024/2, I can
> keep it running pretty much until I pull the plug without any xruns
> although there is a slight backround pop noise every second or so. Not so
> bad as to make casual listening impossible but regular and frequent enough
> to be a deal-breaker for doing any serious audio work. This device works
> well enough to make me believe J2 on ARM is nearly ready, hopefully!
>

Hi Dan,

JACK on ARM should work fine, JACK itself is ready but it seems your 
system needs some tweaking :)

> Sadly, I've not has as much luck with my other 2 USB audio devices but I'm
> hoping the JACK devs can help me fix those. The one that I've had more
> success with is the Focusrite 2i4. I have tried various JACK settings but I
> get the same result - JACK starts and runs xrun-free for just over 3m
> (about 3m 9s) then the gain input LEDs start blinking in tandem (some sort
> of error code) and then I get a steady flow of xruns which I can only stop
> by pulling the USB plug. Here is a JACK log for my 2i4:
>
> Mon May 27 16:30:48 2013: Saving settings to
> "/home/debian/.config/jack/conf.xml" ...
> Mon May 27 16:31:13 2013: Starting jack server...
> Mon May 27 16:31:14 2013: JACK server starting in realtime mode with
> priority 10
> Mon May 27 16:31:14 2013: Acquired audio card Audio2
> Mon May 27 16:31:14 2013: creating alsa driver ...
> hw:USB,0|hw:USB,0|1024|2|48000|0|0|hwmon|swmeter|-|32bit
> Mon May 27 16:31:14 2013: configuring for 48000Hz, period = 1024 frames
> (21.3 ms), buffer = 2 periods
> Mon May 27 16:31:14 2013: ALSA: final selected sample format for capture:
> 32bit integer little-endian
> Mon May 27 16:31:14 2013: ALSA: use 2 periods for capture
> Mon May 27 16:31:15 2013: ALSA: final selected sample format for playback:
> 32bit integer little-endian
> Mon May 27 16:31:15 2013: ALSA: use 2 periods for playback
> Mon May 27 16:31:16 2013: graph reorder: new port 'system:capture_1'
> Mon May 27 16:31:16 2013: New client 'system' with PID 0
> Mon May 27 16:31:16 2013: graph reorder: new port 'system:capture_2'
> Mon May 27 16:31:16 2013: graph reorder: new port 'system:playback_1'
> Mon May 27 16:31:16 2013: graph reorder: new port 'system:playback_2'
> Mon May 27 16:31:16 2013: graph reorder: new port 'system:playback_3'
> Mon May 27 16:31:16 2013: graph reorder: new port 'system:playback_4'
> Mon May 27 16:34:33 2013: Stopping jack server...
> Mon May 27 16:34:38 2013: ERROR: JackPosixProcessSync::LockedTimedWait
> error usec = 5000000 err = Connection timed out
> Mon May 27 16:34:38 2013: ERROR: JackEngine::ClientDeactivate wait error
> ref = 2 name = dbusapi
> Mon May 27 16:34:38 2013: ERROR: failed to deactivate dbusapi jack client.
> error is -1
> Mon May 27 16:34:38 2013: Client 'system' with PID 0 is out
> Mon May 27 16:34:39 2013: ERROR: JackPosixProcessSync::LockedTimedWait
> error usec = 1000000 err = Connection timed out
> Mon May 27 16:34:39 2013: ERROR: JackEngine::ClientCloseAux wait error ref
> = 2
> Mon May 27 16:34:57 2013: ERROR: ALSA: prepare error for playback on
> "hw:USB,0" (Protocol error)
> Mon May 27 16:34:57 2013: ERROR: JackAudioDriver::ProcessAsync: read error,
> stopping...
>

Did you also try running JACK with the -S (synchronous) Jack2 option?

> Of course, the 2i4 runs for much longer than 3m with no probs on my x86
> machines. I've got a 3rd USB audio device (Startech 7.1 - I forget the
> chipset) that works fine with JACK on my laptop but won't start JACK at all
> on my Pandaboard.
>

That's this one right?
http://eu.startech.com/Cards-Adapters/Sound/USB-Audio/USB-7-Channel-Audio-Adapter-with-SPDIF~ICUSBAUDIO7D
Is it recognized? What does cat /proc/asound/cards has to say about it?

Regards,

Jeremy

> Thanks for your help!
>
>
>
> 
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