[Bug 14717] resampled sound is horrible

[wine-bugs at winehq.org]

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

--- Comment #90 from Alexander E. Patrakov <patrakov at gmail.com> 2010-12-27 23:49:59 CST ---
(In reply to comment #87)
> it is meaningless to test those emulated sound card sb16 and ac97 in kvm or
> virtualbox.

I would agree if the emulated sound card used the driver specifically written
for it (i.e., something analogous to the VMware video driver). However, the
emulated card pretends to be a real thing, identical to something manufactured
in real-world silicon, and uses the drivers meant to be used with the
real-silicon cards (i.e., the drivers that come with Windows itself). So these
drivers would send identical output to the emulated and real-world cards and
thus are suitable for reverse-engineering the resampler, provided that kvm
itself does no resampling (that's why QEMU_AUDIO_DAC_FIXED_SETTINGS=0).

The reason for using an emulator is that it allows to capture the output
digitally. A real sound card with S/PDIF output would also work if I had
something that could record from S/PDIF.

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