[Bug 29841] static/distortion when playing sound via alsa pulseaudio

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=29841

--- Comment #5 from Andrew Eikum <aeikum at codeweavers.com> 2012-02-09 08:40:57 CST ---
Okay, thanks. By the way, what version of PulseAudio are you using? Would you
mind gathering another log with the same channels and also ",+timestamp"?

My analysis so far is "I don't know." The ALSA device is reporting loads of
underruns, despite us feeding it data. Possibly our timer to write data to ALSA
is coming late (hence +timestamp). Possibly you're running into a PulseAudio or
alsa-plugins bug.



If you're comfortable hacking code, you could try forcing winealsa.drv to use
the "pulse" device by changing in <dlls/winealsa.drv/mmdevdrv.c>:

-static const char defname[] = "default";
+static const char defname[] = "pulse";

and rebuilding winealsa.drv. That might give you joy. (This is a known issue;
Wine needs better device selection code.)

My reasoning here is this line from your log:

002e:trace:alsa:AUDDRV_GetAudioEndpoint Opening PCM device "default" with
handle_underrun: 0

Coupled with the many underruns ("state 4", "avail: -32"). Given a pulse-backed
device, I would expect "handle_underrun: 1", which might improve things.

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