[Bug 28221] Severe sound stutter in games using OpenAL

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=28221

--- Comment #6 from LBM <knaprigt at gmail.com> 2011-09-05 15:02:32 CDT ---
(In reply to comment #1)
> I tested this against Bioshock 1 (which Google tells me uses OpenAL and/or
> FMOD) and it worked fine. I'll try to find a copy of Bioshock 2, but in the
> meantime can you give me the information requested at
> <http://wiki.winehq.org/Sound>? Having DirectSound in Emulation mode is
> preferred.

True, Bioshock 1 is not affected by this and neither is Mafia 1, but for some
reason both of their sequels are. As for Emulation vs Full Hardware
Acceleration there's no difference. Neither do I notice any difference when
tweaking the HelBuflen, SndQueueMax, SndQueueMin, MaxShadowSize,
DefaultSampleRate and DefaultBitsPerSample registry keys.

One thing that both applications seem to report from Wine 1.3.19 and onward is
however a bunch of the following message:

"fixme:alsa:AudioClient_GetMixFormat Don't know what to do with 6 channels,
pretending there's only 2 channels"

I don't know if that's somehow related to the stuttering but that's pretty much
the only difference in terminal output that I see between Wine 1.3.18 and
1.3.19, without adding any special debugging levels.

As for my systems specs I'm running a Gentoo system with a 32bit 3.0.1 kernel
using Alsa drivers ver. 1.0.24 built into the kernel. Installed OpenAL version
is 1.13.

The logs I've added above are the results from running both Mafia 2 and
Bioshock 2 with Wine 1.3.18 (working sound) and 1.3.19 (with stuttering) using
"WINEDEBUG=+tid,+mmdevapi,+winmm,+dsound,+oss,+alsa,+coreaudio". The logs only
cover entering the games main menus where the problem first occurs (moving the
mouse over the different menu options).

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