[Bug 14717] resampled sound is horrible

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=14717

--- Comment #119 from Raymond <superquad.vortex2 at gmail.com> 2011-01-02 19:40:35 CST ---
(In reply to comment #109)
> (In reply to comment #88)
> > have you noticed that wine developer disable the resampling of the "default"
> > device in dsoutput.c 
> > 
> > #if SND_LIB_VERSION >= 0x010009
> >      snd_pcm_hw_params_set_rate_resample(pcm, hw_params, 0);
> > #endif
> 
> Thanks for pointing this out. This line indeed has an interesting effect. If I
> configure the default sample rate in wine to be 44100 Hz in the default
> "plug:dmix" setup without changing the default dmix rate via
> defaults.pcm.dmix.rate, here is what happens when nothing else is playing:
> 
> 1) this line disables resampling in the plug, effectively leaving us with dmix
> only

it still provide 8bits to 16bits , mono to stereo conversion as your hda does
not support 8bits and mono.

> 
> 2) wine tries to open dmix at "something near 44100 Hz"
> 
> 3) alsa is smart enough to ignore the explicit 48 kHz rate configured for dmix
> in favour of wine request (confirmed by
> /proc/asound/Intel/pcm0p/sub0/hw_params)
> 
> End result: dmix running at 44100 Hz (even though the alsa configuration tells
> otherwise) and playing what wine feeds to it.

you can specify the winecfg's default dsound rate as dmix's sample rate by open
pcm device plug:'dmix:0,RATE=22050' if your hardware support 22050Hz without
changing anything

This mean wine have to specify the default rate (specified in winefg) in
snd_pcm_open() in dsoutput.c


I think it is not correct for wine to allow dsound to use 'dmix' or 'pulse' as
the primary buffer to mix those ds3d games's 16 voices

it is not a good solution for ds3d to use "plughw" device since the mono 3D
spatialisation need software left/right panning of 16 voices performed inside
dsound when your sound card does not provide hardware volume panning for 16
voices

Try using "hw:0,0" instead of "dmix" when running RMAA or rightmark 3dsound

http://appdb.winehq.org/objectManager.php?sClass=version&iId=8993

RightMark 3DSound: Positioning Accuracy test
RightMark 3DSound: CPU Utilization test

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