help. audio "whine" noise when "multi-procerssing" is on

there is quiet audio “whinening” noise when “multi-procerssing” is on. as soon as i check it off the noise disapears.

I’ve had the same issue with a MR824 soundcard, changing it made the whining noise disappeared.

PS: Update your signature ( please :wink: ) maybe some more cross reverenced stuff could see the daylight!