> The support for IMiniportWaveRTStreamNotification is a Windows 7 logo requirement for WaveRT audio driver, while it's optional for Vista. Great! Thanks for your accurate answers. Do you work for Microsoft? Jose Catena DIGIWAVES S.L. ****************** 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.com/