Hi,
you don't need a microphone, just a capture capable sound card, unlike testbot.
Please download mmdevapi_test32|64.exe from testbot: http://testbot.winehq.org/JobDetails.pl?Key=16376 run: mmdevapi_test capture and post or send me the results -- not just the failures, the console output too including position/padding/flags.
Don't be afraid of some test failures in lines 300-499. I'm still investigating underrun and start/stop/reset behaviour.
Thank you for testing, Jörg Höhle