Hi DJ, >In the USB Audio driver as it exists in XP you can expect at least a >latency of 10 ms by design plus whatever time it takes to do the data >copy to the submitted buffers. The explanation makes sense to me; thanks. Is there any reason why one might expect the numbers to be higher when render and capture are combined? It seemed tighter when I just hooked up one direction, but there may have been factors beside usbaudio.sys... Sincerely, Andrew Sherbrooke Art & Logic Lead Engineer, Audio/Media Development asher@xxxxxxxxxxxx www.artlogic.com (425) 844-8607 ****************** 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/