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Hey Ryan,I was wondering if you could give the "loopwave" test in SDL2 a quick run with the Xaudio2 backend, and see if you hear this distortion I'm getting [1].


There's a bug report I made some more details:

https://bugzilla.libsdl.org/show_bug.cgi?id=2551




I thought maybe it was just my PC, but I'm concerned because I reproduced it on a few different computers today. (Windows 8 and 8.1, Realtek and AMD audio.)   The only explanation I can think of is Xaudio2 is using a very low quality (linear or nearest-neighbour) resampler for upsampling.

Thanks,
Eric




[1] Here's an MP3 of what it sounds like to me: https://bugzilla.libsdl.org/attachment.cgi?id=2090

The distortion sounds like static or clipping, and it's not present when playing the sample.wav with a normal media player or an SDL2 backend other than Xaudio2.

I've marked the bug for triage for 2.0.4, so we'll try to get some
solution in there before we ship the next release.

--ryan.



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