Hi I have a small question on clocks: (driver type: AVStream) How can I implement a master clock? All I want is to register to the system a card clock that user-space-clients could use. Now I assume that I need to implement KSPROPSETID_Audio->KSPROPERTY_AUDIO_POSITION. Is this correct for AVStream driver? And should I implement this on a pin or on a filter factory? Waldemar ****************** 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/