I just recently got Natty Narwhal on my laptop and decided to try PD with it. The sound card is HDA Intel i think.

Currently when I open up PD, first of all "compute audio" is unchecked, and when it is checked, no sound comes through OSS, ALSA, or JACK, even sometimes saying "I/O Stuck Closing Audio".

This wasnt always like that though

Originally OSS and ALSA wouldnt work. I read this is something normal, some issue with pulseaudio or something conflicting with the card. I installed jack, and for a little bit, jack worked fine with it. When I went to install a jack plugin for VLC, all of the sudden I had all of these problems.

Im pretty new to both PD and to Ubuntu, so any help would be appreciated.

Thanks

Is pulseaudio-module-jack installed?

sudo apt-get install pulseaudio-module-jack

And do you have the lowlatency kernel installed? It seems to work great:

2.6.38-8-lowlatency

Afterwards, you need to get your jack settings working for your card, which can take a little adjusting. I would recommend installing qjackctrl, or running it to start the jack server if it's already installed. Then you can easily tweak the settings until it works. Then and only then should you launch pd.

Thanks for the tips. So after some more tinkering I decided that I needed to reinstall ubuntu haha. So now Im back at the beginning. Pd doesnt seem to be working with OSS, ALSA is hit or miss, it works occasionally but never consistently. I havent installed anything for jack quite yet though.

Could somebody explain how to set up jack properly for pd? I dont want to end up reinstalling ubuntu again haha. Im new enough to all of this that I dont particularly know how to set it up for my sound card either. If somebody could explain or point me in the direction of some explanation, that would be appreciated.

Thanks

I've gotta run, but I just have to say that the onboard sound will be fine for experimenting and what-not, but you will outgrow it quickly and should seriously consider getting a USB, or better yet PCI, sound - the M-Audio Deltas are awesome, well supported and cheap.

Keep in mind that you don't have to reinstall to experiment with different kernels - use synaptic to get them and they just show up in the Grub.

I did OSS for awhile but switched to ALSA when I started using Jack.

I know nothing about Pulse Audio, only that it doesn't work on my machine (i've never heard sound coming from my HDA intel!) and I'm glad that Jack suspends it when it starts!

I think that new Jack is pulse-audio compatible as udon-juan suggested.

Thank you, ill have to check those cards out. I figure Im going to keep learning pure data until Im comfortable enough with it, then Ill upgrade. Ive installed Qjackctl as well as Jackd, and I installed the pulse-audio module. I even tinkered with the settings a little bit to reduce latency. Still no audio in PD. When I select jack in pd, it says "audio I/O stuck... closing audio". Then as Im typing this post, the DIO errors button is flashing red, bringing up "A/D/A sync errors", and a few unknown ones,

Im not too familiar with what these errors mean, but I do know that this is just about the same situation I was in haha.

This just in. Just tried to run it again, this time I got a little bit of crackling from pd and these messages. Still no sound though.

11:16:24.152 JACK connection graph change.
11:16:44.517 JACK connection graph change.
11:16:44.617 JACK connection graph change.
11:16:44.784 JACK connection change.
11:16:57.326 XRUN callback (1).
JackEngine::XRun: client = pure_data_0 was not run: state = 1
JackAudioDriver::ProcessGraphAsync: Process error
JackPosixMutex::Unlock res = 1
JackAudioDriver::ProcessGraphAsync: Process error
JackEngine::XRun: client = pure_data_0 was not run: state = 1
JackAudioDriver::ProcessGraphAsync: Process error
JackPosixMutex::Unlock res = 1
JackEngine::XRun: client = pure_data_0 was not run: state = 1
JackAudioDriver::ProcessGraphAsync: Process error
JackPosixMutex::Unlock res = 1
JackEngine::XRun: client = pure_data_0 was not run: state = 1
JackAudioDriver::ProcessGraphAsync: Process error
JackPosixMutex::Unlock res = 1
11:16:57.367 JACK connection graph change.
JackAudioDriver::ProcessGraphAsync: Process error
11:16:57.481 JACK connection change.
11:16:58.685 XRUN callback (3 skipped).

EDIT: Jeeze... now ALSA is working. Still no jack. But no other sound is coming through with ALSA. Youtube wont play at the same time.

That sounds fun. Try this:

Run Jack but don't "start" it
Run PD and select Jack as your audio, say2 in2 out - now Jack should say status 17
Okay, now start Jack
In PD, select Jack again
In Jack, open the connections tab - you should see puredata as an output and something that's not PD as an input - connect those.

If ALSA is working then make sure that Jack is told to use ALSA before those other steps.

THANK YOU! It looks like Ive got sound through JACK. Im still getting a load of A/D/A Sync errors, but nevertheless, this is a step forward.

Yeah... the "DIO errors" box is flashing red every few seconds with an A/D/A sync error.
Hmmm...

DIO errors and A/D/A sync just means it's working! Seriously I get those and they don't bother me - usually...