Looking at Google Analytics I’ve found out that somebody came to this site looking for solution of WASAPI issue. Well, maybe it should be here
On builds before 7068 WASAPI was working as expected. But all newer builds (up to RC1 7100) cause it to throw “unrecoverable playback error: could not open device 88890020″.
I don’t know what exactly does it mean, but I know how to fix it. The default 1000 ms buffer size does not fit for some reason, so you should decrease it – 500 (and less) ms buffer is ok. Note that this number could vary for different hardware.
Well, maybe it’s not a perfect solution, but it does work for now!