In your submission readme.txt, cite errata 511 for this failure, which will prompt a manual review of the submission. This looks like test bug Windows Blue Bugs 17160 to me. From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of M'hand Boughias Sent: Wednesday, June 5, 2013 10:11 AM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] DTM Test on USBAUDIO.SYS with a custom INF, with Windows 8 Hi, I am trying to pass the DTM audio test on an USBAUDIO device with a custom INF. My custom INF : - Includes wdma_usb.inf - Calls the USBAudio sections to install the usbaudio driver - Add a custom LFX APO dll It seems that WaveTest.exe does not recognize my driver as usbaudio.sys and try to pass this test : Reset Pin while streaming data. This test fails because USBAUDIO.SYS is not a port class driver and does not support the IOCTL_KS_RESET_STATE request. WaveTest output : FAIL: Pin has not responded to IOCTL_KS_RESET_STATE command for KSRESET_BEGIN correctly. Position after reset is not zero When I start the same test with the standard wdma_usb.inf installation, WaveTest write: The driver used is a known non-portcls driver: wdma_usb.inf. ... IOCTL_KS_RESET_STATE is not required to be supported by non-portcls drivers And the test is skipped. I tried to apply the DTM Filters, there is a DTM filter related to this issue (ID:511, https://sysdev.microsoft.com/fr-FR/Hardware/EC/FilterDetail.aspx?id=271) but it is only for the capture pin, not for the render pin. Have you any idea how to pass this test with a custom INF? Regards, M'hand BOUGHIAS