swarna jakka wrote: > Thanks for your support > I will enumerate the device with your suggestions. > Is there any full Compliance Test for USB Audio Class device. Not one that I am aware of. There are generic tests for USB compliance available from the USB Implementor's Forum at usb.org. And remember, the limitation I talked about is specific to usbaudio.sys, not the Audio Class spec. The Microsoft DTM kit tests audio devices thoroughly, but for most audio devices, Media Player and/or Sound Recorder are a pretty good test. -- Tim Roberts, timr@xxxxxxxxx Providenza & Boekelheide, Inc. ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/