Mixxx

Alsa callback stops fireing for a few second in case of underflow

Bug #1310553 reported by Daniel Schürmann
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Mixxx
New
High
Unassigned

Bug Description

This happens with low audio buffer sizes and realtime scheduling.

We should really sure what is going on here, because this could likely be a party stopper, when using effects and key-lock on a four deck setup.

Tested at Ubuntu Saucy 64bit.

Revision history for this message
Daniel Schürmann (daschuer) wrote :

It happens only at 2,9 ms audio buffer, not at 1,45 ms, not at 5,8 ms.
The audio thread does not return from a poll() inside PA / Alsa.

Revision history for this message
Daniel Schürmann (daschuer) wrote :

It seams not to be directly connected to the CPU load.
I am currently using Mixxx at 2.9 ms during my tests and i experience this bug also if keylock is disabled.

Revision history for this message
Owen Williams (ywwg) wrote :

daniel are you still seeing this?

Revision history for this message
Daniel Schürmann (daschuer) wrote :

Yes, on my current Upuntu Trusty setup cannot use 2.9 ms at all, but 1.45

RJ Skerry-Ryan (rryan)
Changed in mixxx:
importance: Undecided → High
tags: added: engine performance
tags: added: portaudio soundio
tags: added: alsa
Daniel Schürmann (daschuer)
tags: removed: alsa soundio
Revision history for this message
Swiftb0y (swiftb0y) wrote :

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/7443

lock status: Metadata changes locked and limited to project staff
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