Well, if you are using a plug like a compressor and you want to control how much signal is being fed into it before effects etc., you would want to adjust the input accordingly. Gord ----- Original Message ----- From: Brian Howerton To: ddots-l@xxxxxxxxxxxxx Sent: Sunday, March 27, 2011 8:13 PM Subject: [ddots-l] trim knob in sonar Hello folks, What is the purpose of the trim knob in sonar? When would you want to use the volume and when would you want to use the trim knob?