[wdmaudiodev] Re: Vista: multichannel playback
- From: Mitchell Rundle <mitchr@xxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 10 Jan 2007 14:40:35 -0800
<< I only have indications of 16-24 bits, 32k-96k formats with no channel
information indicated. >>
Channel information is not indicated in the "advanced" page format selection
for speakers and HDMI endpoints. For those, the channel count is implied by
the speaker configuration which is set in the speaker config wizard.
<< My recording devices shows only 2 channel formats too, I don't know how to
change that at the moment. >>
I just looked at the mmsys.cpl code and see that it only queries for 1 and 2
channel formats for capture. I'll file a bug on that. The only workaround I
can see is to constrain your dataintersection (or preferreddataformat) handlers
to only allow the highest number of channels possible for that device. i.e. if
you have an 8-channel line-in, don't say that you can do stereo. This is only
a partial solution, and not a very good one -- the end result is that you will
have only one 1 8-channel format listed in the cpl.
Regards,
Mitch
This posting is provided "AS IS" with no warranties, and confers no rights
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of uwe kirst
Sent: Wednesday, January 10, 2007 1:25 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Vista: multichannel playback
Philip Lukidis wrote:
>Hello Uwe, I have downloaded 6_channel_id.wav, and I was able to play it with
>WMP on Vista RTM (32 bits). I can confirm proper output for each channel.
>However, my render pin is KSNODETYPE_SPEAKER and not
>KSNODETYPE_LINE_CONNECTOR. Is your current driver with
>KSNODETYPE_LINE_CONNECTOR, or KSNODETYPE_SPEAKER? I have not tried with an 8
>channel file because I have been unable to find one so far.
>
>
>
I have one device with KSNODETYPE_SPEAKER and another with
KSNODETYPE_LINE_CONNECTOR.
I also checked KSNODETYPE_DIGITAL_AUDIO_INTERFACE, but without any luck.
>However, concerning my multichannel analog subdevice, I do not have any
>indications of number of channels, while you say "on the advanced page there
>are more formats available, including 6 channel and 8 channel formats". I
>only have indications of 16-24 bits, 32k-96k formats with no channel
>information indicated. This is strange. My analog record subdevice formats
>in the advanced tab indicates 2 channels, despite the fact that I allow for up
>to 12 channels.
>
>
My recording devices shows only 2 channel formats too, I don't know how
to change that at the moment.
>Concerning the WMP failure, I'm not sure what to suggest,
>
I will ignore that, because I checked out the samplitude 8.11 demo,
which runs under vista. I was able to play 8 channels out of my line
connector with that. I think thats good enough for the moment.
So the next important question is howto enable mulichannel recording?
Mitch? any suggestions?
Thanks,
Uwe
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