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.