Comment 93 for bug 1801540

(In reply to thomasg from comment #54)
> I, too, tried without pulseaudio and plain alsa, and too noticed, that the
> noise is different (in a way that makes it slightly less annoying).
> This however does not mean, that eliminating pulseaudio eliminates the noise
> issues, pulseaudios parameters just make the noise profile seem a little
> worse.
>
> In any case, the quality without pulseaudio is still unacceptably horrible
> and I would never make anyone else listen to audio captured with said noise
> willingly.
> This clearly is not a pulseaudio issue.

Yea, even to me this looks more like an ALSA driver bug more than a pulseaudio one.

Still, for curiosity, I've run pulseaudio from a terminal with log enabled and inserted the loopback module to test if the actual noise coming from the microphone was triggering something inside pulseaudio, but as far as I can see I don't see any problem in it.

I'll attach it here hoping that it will help narrow down this bug. I've tried to search how to have a log from ALSA, I found something setting flag in the kernel, enabled it passing parameters to the correct audio codec but I don't see how to actually get it, since dmesg doesen't show anything from ALSA when microphone is running.