Sysaudio had problems dealing with filters with no nodes. Could you try adding a single node? Also in earlier operating systems, sysaudio had problems dealing with filters with only a capture pin. That limitation is fixed in WinXP. Alper Selcuk This posting is provided "AS IS" with no warranties, and confers no rights. -----Original Message----- From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Konrad Rozeslaniec Sent: Saturday, November 06, 2004 9:17 AM To: WDMAUDIODEV Subject: [wdmaudiodev] SysAudio - AVStream I've got question concerning relationship between AVStream and WaveformAPI. I've written AVStream minidriver with one filter and one capture pin (no nodes and connections). Now I want it to be visible to WaveformAPI. There are some requirements imposed by SysAudio driver. Pin and filter categories, names etc. But what else. For example, is it necessary to have ADC / DAC nodes in your filter and additional Data input/output pins with subformat ANALOG and communication NONE? I have suspicion that my problem lie somewhere here. Is there some document that describes these requirements? 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/ ****************** 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/