I would like to ask the community to please use the exact ksnodetype that matches the device you are connecting to Windows. These form factor hints are used by the system for policy decisions. If the logical device is a pair of headphones then please use the KSNODETYPE that matches that form factor device (in that case KSNODETYPE_HEADPHONES)

 

You can read more about how device topology works in Windows Vista here:

 

http://ampalliance.org/files/folders/summit_decks/entry53.aspx

 

 

 

More info relating to Windows Vista and audio:

 

http://ampalliance.org/blogs/microsoft/archive/2007/08/14/Microsoft-AMP-Summit-Decks.aspx

 

Sincerely,

 

Hakon Strande | Windows Sound Team PM | (p) 425.705.0637

 

From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Jeff Pages
Sent: Monday, March 10, 2008 3:20 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Exposing a topology to Vista

 

Hi Andrew,

 

Going from memory of a discussion on this list a couple of years back (and I might well be wrong), I think Vista requires the default playback endpoint to be either a KSNODETYPE_SPEAKER or KSNODETYPE_LINE_CONNECTOR pin. If it's a KSNODETYPE_SPEAKER pin, it always appears "Speakers" whereas a KSNODETYPE_LINE_CONNECTOR pin is given its pin name. As far as I know, none of this Vista-specific stuff has been documented in the WDK as yet.

 

Jeff

 

----- Original Message -----

From: Andrew Murray

To: wdmaudiodev@xxxxxxxxxxxxx

Sent: Tuesday, March 11, 2008 1:41 AM

Subject: [wdmaudiodev] Exposing a topology to Vista

 

Hello,

 

I have constructed an audio driver that currently consists of a WaveCyclic filter and a Topology filter. The topology I expose from these filters appears fine in Windows XP and KsStudio. However I am not having as much luck within Vista…

 

When the ‘sounds’ applet from the control panel in Vista is opened the correct playback and recording endpoints appear and have the correct properties associated with them (i.e. volume, mute, etc). However a red cross appears on the speaker in the system tray and the message “No audio device is installed” appears when I click on ‘Open Volume Mixer’…

 

I’ve searched the archives for this group and browsed the internet but cannot find any clues as to what may be causing this. Does the group have any suggestions? Or can someone point me in the right direction, particularly in where I can find documentation regarding the way in which Vista (or XP for that matter) discovers the driver’s topology.

 

Most of my topology’s pins have custom names; does Vista look for specific names?

 

Thanks,

 

Andrew Murray

 

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