If you go to the Levels tab in the Sound control panel and click Balance, how many sub-sliders do you see? Windows assumes the number of channels in the endpoint volume control is static for a given endpoint and will never change for the life of the endpoint, regardless of what the device format is. ****************** 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/