> AFAIR that's what KMixer does with those cards. Do I have any chance to retrieve information about this from the driver? KSPROPERTY_AUDIO_CHANNEL_CONFIG seems to be the logical choice - but I'm not certain if I can read this property from the filter or pin... My Tests so far with this function always failed. Tobias ****************** 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/