[LAD] ALSA multi plugin and JACK xrun callbacks

[Lee Azzarello]

On Thu, Dec 16, 2010 at 6:58 AM, torbenh <torbenh at gmx.de> wrote:
> On Thu, Dec 16, 2010 at 08:02:29AM +0100, Luis Garrido wrote:
>> On Thu, Dec 16, 2010 at 4:21 AM, Lee Azzarello <lee at rockingtiger.com> wrote:
>> > Hello, I'm looking for some advice for an interesting symptom of
>> > putting my M-Audio Fast Track Pro USB sound card into ALSA multi mode.
>>
>> I have no idea what might be happening, but an alternative to use
>> several alsa devices in jack would be the alsa_in and alsa_out
>> utilities shipped with jack, perhaps that will give you less trouble?
>
> hmm... the interesting thing is that he actually claims to not have
> trouble. he only gets xrun callbacks. this is weird.

It is weird indeed. More detail:

1) My test parameters included only playback among multiple
applications, no recording nor duplex playback/record
2) I'm running Debian testing with the standard kernel on a Thinkpad X61
3) I considered the test successful when I could play back mp3s
continuously for over an hour while generating a test tone from Pure
Data at the same time. I also tested quitting and restarting PD while
alsaplayer continued to play back sound

I'll test the alsa_(in|out) utilities later today.

-lee