As far as I know, you do not need to have a separate topology and playback/capture filter in an AVStream driver; you can create a filter with pins implementing playback/capture and insert your topology nodes in this same filter. At least, this is how I do... Oh and if you figure out how to describe the multi-channel node capability with AVStream (see "Exposing Multichannel Nodes"), please let me know. Mat -----Original Message----- From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Harry Graham Sent: Tuesday, June 08, 2004 11:28 AM To: 'wdmaudiodev@xxxxxxxxxxxxx' Subject: [wdmaudiodev] AVStream Topology Filter I am trying to get an AVStream audio topology filter to connect to the corresponding audio capture filter. I noticed that the KSPROPERTY_PIN_PHYSICALCONNECTION property is not implemented by the AVStream framework on either of these filters. How can I get the framework to implement this property? Or is there an explicit method to register the filters, similar to PcRegisterPhysicalConnection? Thanks, Harry ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/