[PlanetCCRMA] Pd + PulseAudio?

Fernando Lopez-Lezcano nando at ccrma.Stanford.EDU
Tue Mar 23 23:11:27 PDT 2010

On Tue, 2010-03-23 at 23:26 -0400, Peter Kirn wrote:
> Hi Fernando,
> Thanks for the tips on ALSA vs. jack; of course, makes sense, ALSA is
> still plugging into PulseAudio when not using JACK.
> cat /proc/asound/devices: yep, just the Intel (and the AK1, if it's plugged in)
> Here's where things get a little weird.
> 1. I start qjackctl
> 2. Set audio to hw:1 for the Intel card and start jack server

(probably better to set it to hw:Intel as then it would be independent
on whether the AK is plugged in or not)

> 3. Start Ardour -- Ardour uses JACK and the Intel card, no issue --
> sound through the computer's speakers
> 4. Start Pd, set to JACK, try testing audio (with the default
> testtone) ... nothing. No error in Pd, but also no sound.
> Looking at AlsaMixer as you suggest, I definitely see the HDA Intel
> card. Master and PCM have volume levels; Headphone and Speaker show up
> but do not have mixer values.
> Anything else to check?
> Now it seems the question is, why would Pd have an issue playing
> through JACK with one card and not another, and why would it have that
> issue with that card when Ardour does not?

Hmmm, is pd autoconnecting? Do the pd jack ports show up in the jack
"Connect" dialog? If Ardour makes noise pd should as well...

-- Fernando

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