[PD] audio drops for few ms, or one sec, with jack on ubuntu (was: Mess with Pd installation on Linux)

Alexandros Drymonitis adrcki at gmail.com
Thu Jan 2 13:05:58 CET 2014

Forgot to mention that whenever I move a window around, open a subpatch,
swich between applications while the audio is running, the sound stops till
I stop which ever action.
Also I'm running $ jackd -d firewire -d hw:NVidia (forgot to write hw: in
the first email)

On Thu, Jan 2, 2014 at 1:29 PM, Alexandros Drymonitis <adrcki at gmail.com>wrote:

> Coming back to a previous thread I started, having compiled pd with jack,
> having done the realtime scheduling in jack, opening pd with '-jack' and
> '-rt' I still get some audio drop outs. The sound actually stops for a few
> ms, or even about a second, then comes back.
> From the previous thread I was told that probably jack is waiting for
> samples that pd doesn't provide at certain moments. I went through jack's
> manual, but it is a manual for programmers and I'm not one, so I didn't
> make much of it.
> The only thing I found in jack's FAQ is a question about audio with jack
> on a macbook (I'm on a macbook with ubuntu) that mentions a drivers problem
> that distorts the output http://jackaudio.org/macbook_distortion
> but my output is not distorted...
> I also tried to start up jack like this $ jackd -d firewire -d NVidia
> but it really didn't make any difference (why should it? it uses the same
> sound card with or without  '-d NVidia'). Also used QjackCtl to change the
> block size, but also didn't work.
> Dunno if this message in jack's terminal says something about the
> situation:
> JackEngine::XRun: client = pure_data_0 was not run: state = 2
> JackAudioDriver::ProcessGraphAsyncMaster: Process error
> It appears whenever I open pd with '-jack'
> I'm on a macbook 5,2 with ubuntu 12.04 and pd-0.45-4
> Can anyone help?
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