Hello, sorry if this was discussed already - didn't find it in the archive: is it true that muting an audio instrument channel (in the environment window) does not reduce the cpu load at all? I found this in a song today, where I would still have 50% of cpu load with everything muted ... I had to alt-click the plugins to really drop the performance bar to zero. My system: Regards, Armin Logic 5.5.0 OS X 10.2 G4/733 QS / 640 Ram