[Bug 28723] Sound stutter in Rage when emulated windows version is set to "Windows 7" (XAudio2 -> mmdevapi sound output path)

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=28723

--- Comment #71 from Alexey Loukianov <mooroon2 at mail.ru> 2011-12-06 20:06:55 CST ---
Some news from Vista side:

1. Same hardware and same driver (i.e. - notebook with Vista I have here ATM is
exactly the same model I had been running my tests on Win7 Starter, namely Acer
Aspire One 522 equipped with Conexant HDA codec) results in different default
period size (441f on Vista vs. 448f on Win7) and different "20ms buffer size"
(882f on Vista vs. 896f on Win7).

2. Test case "feed exactly 441f once per event": produces constant xrun-free
sound if the system isn't under heavy load.

3. Test case "feed 5ms of data every event": produces buzz which - accordingly
to the readings my oscilloscope shows - had somewhat different waveform
compared to produced by Win7, but the period seems to be 100Hz and not 50Hz
Jörg had been predicting.

Still have more tests to run/analyze but, as always, middle of the week take
its toll of spending time on work projects rather than on "areas of personal
interests" :-(. Would post some more as soon as would have results ready.

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