[wdmaudiodev] HCK for Windows 8.1 and USB Audio Class 2 devices

  • From: Franz Detro <franz.detro@xxxxxxxxxxxxxxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Wed, 16 Jul 2014 12:54:26 +0200


has anybody on the list experience with getting a USB Audio Class 2 device with 
a propietary driver pass the audio device tests in HCK for Windows 8.1?

I am seeing a number of severe issues here with some of the tests:

(1) KS Position tests do fail due to startup timing and jitter issues
(2) Lullaby test does fail due to startup / shutdown issues on the USB isoc 
(3) General Audio test fails (on Windows 7 only) due to a failure IOCTL\KS 
defined\IOCTL_KS_WRITE_STREAM\Cancel IO test

Some research in the HCK filter database shows that there are filters for such 
issues for the inbox USB Audio Class 1 driver (and the Bluetooth audio stack), 
so it looks like this kind of problems is known to Microsoft.

Can anybody shed some light here?

Thank you very much in advance!


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