Hi, Thanks to all five users who sent me data. I've a new testbot job. Please download mmdevapi_test32|64.exe http://testbot.winehq.org/JobDetails.pl?Key=16386 you don't need a microphone, just a capture capable sound card, unlike testbot. there should be next to 0 failures in lines 200-410. Failures in 411-600 (function test_capture2) are not interesting. It would be good to repeat the test a few times to see whether there's a random failure. Also, please compare mmdevapi_test[64].exe capture with mmdevapi_test[64].exe capture > capture.log Redirecting to a file leads to vastly different results (in the render tests) because output to the MS-DOS shell is extremely slow and thus affects timing. On a 64bit machine, you may also compare the output of both executables. The behaviour is apparently not the same! On Unix with ALSA, you may try my latest patches from source.winehq.org/patches and see if it works for you. - Stop without snd_pcm_drop patch - Reset accounting patch - CaptureClient protocol patch I'm at 0 failures (ignoring test_capture2) and a few todo with dmix and 0-1 (random) with PulseAudio. Please post or send me the results -- not just the failures, the console output too including position/padding/flags. Thank you for testing, Jörg Höhle