[wdmaudiodev] Receiving unmodified audio data in Vista
- From: KS <wakeup1504@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Fri, 23 Oct 2009 22:02:13 +0800
Hi,
I'm trying to receive unmodified audio data in my audio driver in Vista.
What I've already done is to disable the APO, set the format of the endpoint
to the same format as the media file, and set all relevant volume control to
0dB level. I'm using WMP to play the audio file which is a wave file.
What I'm seeing so far is that I can receive the unmodified data if the
format is at 96kHz 24bit, but not when the format is at 48kHz 16bit. Is
there additional settings that need to be set before a driver can receive
48kHz 16bit data without modification, or is there some background
processing that is done in the audio stack for 16bit audio that resulted in
drivers not being able to receive unmodified audio data for 16bit?
Thanks
KS
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