My AVStream filter has four pins (capture, render, speaker, line-in) and two nodes (ADC,DAC). While supporting 8KHz 8bit alaw input pins are visible as wave devices on W2K. After changing format to PCM also output pins become visible. But on WXP it doesn't work. I suppose XP has some more reqirements for wave devices. Does anyone have any idea? with regards Konrad ****************** 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/