Hello experts, I'll try my luck here. I have written an AVStream audio driver: it contains two filters factories: one for playback, one for capture. My playback filter works great but I'm having problems with my capture filter. Btw, I use pin-centric processing. When I press record on 'sound recorder', the capture pin is created, its format is set accordingly, its state gets switched to KSSTATE_RUN, but then... nothing happens. The pin process dispatch never gets called, no matter if I call KsPinAttemptProcessing(). I also removed the KSPIN_FLAG_DO_NOT_INITIATE_PROCESSING flag, which I needed to use. Whatever I do, PinProcess does not get called, and KsPinGetLeadingEdgeStreamPointer() always returns NULL. I looked at the AVStream DDK samples but I didn't see anything special that would have explained what I'm witnessing. What's the problem with my pin? What am I missing? Thank you very much for any help, Mat ****************** 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/