Oh right Nice one Evil G, thanks for that. I've just tried it and what I did was bounced my kick loop to audio then put that on its own channel and as you say made that the controller for the bassline compressor. When I mute this track I can still hear the bassline ducking, I must admit I don't understand how though! If I mute a track surely its signal can't go anywhere? So how can it still be triggering the compressor?