[wdmaudiodev] Re: Windows Vista SP1 and 24-bit audio
- From: "Jeff Pages" <jeff@xxxxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Fri, 30 May 2008 09:16:58 +1000
Hi Dan,
I had the same problem. Check your DataRangeIntersection handler and make
sure it's not rejecting PKSDATARANGE_AUDIO requests with
MaximumBitsPerSample set to 24. Although the WDK documentation (under "PCM
High Bitdepth Stream Data Range") says that MaximumBitsPerSample is set to
the container size (in this case 32 bits), Vista doesn't.
In my case it appeared that the RTM build of Vista ignored my
STATUS_NO_MATCH return, but SP1 didn't and therefore disallowed all 24-bit
formats. Once I made my DataRangeIntersection handler accept a
MaximumBitsPerSample value of 24, everything was sweet.
Jeff Pages
Innes Corporation Pty Ltd
----- Original Message -----
From: "Daniel E. Germann" <deg@xxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Friday, May 30, 2008 7:29 AM
Subject: [wdmaudiodev] Windows Vista SP1 and 24-bit audio
We've had several customers report that after installing Windows Vista
SP1,
all the 24-bit formats disappear from the Advanced tab for our devices in
the Sound control panel. We checked, and sure enough, all the 24-bit
formats that used to be there with RTM are gone with SP1.
Is there anything that would have changed with SP1 that would cause this?
Thanks,
-Dan
--
Dan Germann
Digital Audio Labs
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