Are all the dropouts detected from Jack, PA, WASAPI?

Help for Audacity 2.x.x on GNU/Linux.

ImageThis forum is for Audacity 2.x.x on GNU/Linux.
Please state:
  • which version of Linux you are using,
  • the exact three-section version number of Audacity from Help menu > About Audacity,
  • whether you installed your distribution's release, PPA version, or compiled Audacity from source code.

Audacity 1.2.x and 1.3.x are obsolete and no longer supported. If you still have those versions, please upgrade (see https://www.audacityteam.org/download/).
The old forums for those versions are now closed, but you can still read the archives of the 1.2.x and 1.3.x forums.

Are all the dropouts detected from Jack, PA, WASAPI?

Permanent link to this post Posted by Kdmeizk » Thu Mar 15, 2018 4:03 pm

Hello,


Are all the dropouts detected when the sound comes from:
  • [UNIX] Jack → Audacity
  • [UNIX] PulseAudio → Audacity
  • [Windows] WASAPI (loopback) → Audacity
Kdmeizk
 
Posts: 34
Joined: Mon Mar 20, 2017 5:28 pm
Operating System: Windows 7

Re: Are all the dropouts detected from Jack, PA, WASAPI?

Permanent link to this post Posted by steve » Fri Mar 16, 2018 10:19 am

No, Audacity can't detect "upstream" dropouts, only "downstream".
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)
steve
Site Admin
 
Posts: 46541
Joined: Sat Dec 01, 2007 11:43 am
Operating System: Linux *buntu

Re: Are all the dropouts detected from Jack, PA, WASAPI?

Permanent link to this post Posted by Kdmeizk » Fri Mar 16, 2018 1:11 pm

Ok. So if Jack produces a dropout, Audacity cannot know it, only Jack can know it, right?
Kdmeizk
 
Posts: 34
Joined: Mon Mar 20, 2017 5:28 pm
Operating System: Windows 7

Re: Are all the dropouts detected from Jack, PA, WASAPI?

Permanent link to this post Posted by steve » Fri Mar 16, 2018 2:42 pm

I did some tests, and that appears to be the case.
If you use QJackCtl to configure and start Jack, it will show xruns that occur on its side of Audacity.
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)
steve
Site Admin
 
Posts: 46541
Joined: Sat Dec 01, 2007 11:43 am
Operating System: Linux *buntu

Re: Are all the dropouts detected from Jack, PA, WASAPI?

Permanent link to this post Posted by Kdmeizk » Fri Mar 16, 2018 6:50 pm

I do not really understand. An xrun is shown in QjackCtl, and Audacity knows an xrun happened in QjackCtl? But you said Audacity cannot detect “upstream” dropouts?

In general, Jack/PulseAudio/WASAPI (= what I understood as your word “upstream”), Audacity really does not know if they produce a dropout, right?
Kdmeizk
 
Posts: 34
Joined: Mon Mar 20, 2017 5:28 pm
Operating System: Windows 7

Re: Are all the dropouts detected from Jack, PA, WASAPI?

Permanent link to this post Posted by steve » Sat Mar 17, 2018 7:23 pm

Kdmeizk wrote:An xrun is shown in QjackCtl, and Audacity knows an xrun happened in QjackCtl?

No, Audacity does not know that.
I was trying to say that Audacity 2.2.2 can detect "downstream" dropouts (missed writes to disk), and if you use QjackCtl, then QjackCtl will show "upstream" dropouts (xruns detected by Jack).
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)
steve
Site Admin
 
Posts: 46541
Joined: Sat Dec 01, 2007 11:43 am
Operating System: Linux *buntu

Re: Are all the dropouts detected from Jack, PA, WASAPI?

Permanent link to this post Posted by Kdmeizk » Sat Mar 17, 2018 9:55 pm

steve wrote:Audacity 2.2.2 can detect "downstream" dropouts (missed writes to disk)

Because they are reported to Audacity (thanks to errors I assume)?
Kdmeizk
 
Posts: 34
Joined: Mon Mar 20, 2017 5:28 pm
Operating System: Windows 7


Return to GNU/Linux



Who is online

Users browsing this forum: No registered users and 3 guests