In mmsys.cpl I've noticed that for some playback devices, under properties->advanced tab, there are duplicate entries in the default format pull down list. For example two instances of 2ch, 24bit, 48KHz. Selecting one of the duplicates and playing the test tone causes an error message "The Device is being used by another application. If you continue, that application may stop working. Do you want to continue?" selecting yes causes an error "Failed to play test tone." If the other duplicate entry is selected you are able to play the test tone like normal. Has anyone else seen this issue? Is this a Vista UI issue or is it more specific to the drivers for the audio device. ****************** 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/