[wdmaudiodev] Re: Multichannel audio device seen as stereo
- From: "Stephan Kappertz" <stephan@xxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Thu, 6 Nov 2003 17:30:44 +0100
Did you set the speaker layout for your device to 7.1 in Control Panel |
Sounds and Audio Device Properties | Advanced Audio Properties ?
WinDVD checks this property and disables/enables multichannel support based
on the entry. The default value for this property is stereo, no matter how
many channels your device has.
Moreover if you support this property in your minidriver, you might be
handling it incorrectly, making Windows believe that you don't support
anything else than KSAUDIO_SPEAKER_STEREO.
Stephan
----- Original Message -----
From: <bart@xxxxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Thursday, November 06, 2003 2:37 PM
Subject: [wdmaudiodev] Re: Multichannel audio device seen as stereo
>
> > >Hi,
> > >
> > >I have a 8 channel audio device with a KS driver based on the msvad
example
> > >from the DDK. Some DVD players, like WinDVD and MaximusDVD, only give
me
> > >stereo output, others like PowerDVD and DirectDVD give me surround
output
> > >with the same driver. In both cases I see that KS gives me 8 channels,
as
> > >I requested in DataRangeIntersection but for some reason the players
believe
> > >it is only a stereo device. Does anybody has a clue what could cause
this?
> > >
> > >
> > >
> > There are at least 2 ways of supporting more than 2 audio channels:
> > multi device stereo or multi channel interleaved. Seems that your DVD
> > player does not support multi channel interleaved.
> >
> I don't think this is the problem because WinDVD has a checkbox where it
can
> be forced to use DirectSound, and this is always multi channel
interleaved. Also
> could there be a problem with the phase when a player would use multi
stereo.
>
> Bart
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