[wdmaudiodev] Capture audio from USB Audio Device on XP (SP2)
- From: "Edwin van den Oosterkamp" <edwin@xxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Mon, 13 Feb 2006 12:30:23 -0000
Hello,
My application uses Direct KS to access audio interfaces. This works well for
standard (PCI) interfaces and USB interfaces on Win2000. The only problem I
have is capturing on a "USB Audio Device" on Windows XP (SP2). I can find the
correct filter, create a pin and set it to the running state. It just never
produces any data, but I don't get any errors either. Rendering (on the same
USB device on the same system) works fine. Using the same code on the same
system but with a PCI audio interface works fine as well.
The application prefers stereo 48kHz 16bits. I've tried other settings (like
44.1kHz) but without result.
I've tried a number of USB audio devices (of different manufacturers) - all use
the same built-in driver and all give the same result.
I've used event-driven I/O as well as synchronous I/O - neither method produced
any audio data.
I've tried WAVEFORMATEX as well as WAVEFORMATEXTENSIBLE (both for PCM audio) -
with no positive result.
So I Googled, searched MSDN and read various forums and mailinglists. I found a
few people with similar problems, but unfortunately without solutions.
I hope someone on this list will be able to point me in the right direction to
solving this one. Maybe I need to do something additional while setting up the
capturing on USB? Is there a special waveformat I need to use to capture from
USB? Any suggestion will be welcome - the wall is getting pretty dented here
from me banging my head against it and all...
Best regards,
Ing. Edwin van den Oosterkamp
R&D, MDO UK
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