Harsh transient pop when exiting with a preview playing

[Milkii Brewster]

I'm noticing that if I start to preview a track, then I exit Mixxx, I get quite a loud pop in my headphones.

[Daniel Schürmann (daschuer)]

We do not fade out on exit, but this "pop" should not be louder than the audio played before.
Is the "pop" louder than the audio or just a click/crackle?

I can imagine that the headphones playing an uninitialized buffer.

Which audio API do you use? Are all APIs affected? Which soundcard do you use?

[Milkii Brewster (mxmilkiib)]

Yes, a louder very brief static like pop, rather than a non-0 last value from a bad cut of a sample pop.

Straight ALSA, the headphone DAC (channel3/4) on a Reloop Beatmix 4.

I've not got audio routing to it via pulse or JACK working before, but I can maybe find time try with asla_out in the next few days if it's needed.

[Daniel Schürmann (daschuer)]

No need to configure JACK. Does it also pop if you use the pulse device?
This can be used when Mixxx is started from the command line.

[Milkii Brewster (mxmilkiib)]

I've tried again with setting headphones to pulse (with also restarting the app), and I see "ALSA plug-in [mixxx] etc" source in pavucontrol, but I don't get any output when a preview track is playing.

(I also see the ALSA plug-in Snapclient source for the Snapcast stream from my mpd server, and that does give output when I play that.)

[Milkii Brewster (mxmilkiib)]

I got pulse working for headphone out, but I've been unable to replicate the pop on exit after a nubmer of tries.

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/10158