[wdmaudiodev] DirectSound under Vista with more than 8 channels device
- From: Markus Bollinger <bollinger@xxxxxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Thu, 19 Jul 2007 09:43:17 +0200
Hi All,
How can I implement an audio driver (WavePCI/WaveRT) for Windows Vista that
- has a device with more than 8 channels (> 7.1) and
- can be accessed via DirectSound with more than 8 channels?
Under Windows XP this is no problem, it works up to 24 channels without
any problem.
Under Windows Vista a device :
- with a "KSNODETYPE_SPEAKER" Endpoint is used by the audio engine via
channels and channel-mask up to 7.1.
even if the device can do more channels, there won't be used more than
8 channels.
- with a "KSNODETYPE_LINE_CONNECTOR" is used by the audio engine via
channels and channelmask=0.
this works up to 30 channels (Server 2008 Beta1 : 32 channels) with
the "test" button or SndRec32.exe,
but DirectSound only works when configured to mono or stereo
(MediaPlayer, WinAmp).
Is there anybody with a hint or a guideline or has anybody solved this
issue ?
Best regards,
Markus.
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