I purchased a midi file backing track and opened it in cubase 7. As normal it assigned the channels and halion instruments. The thing is i want to change some instruments etc but when i open halion and turn down the volume of an individual track it works fine but when i stop the track the volume slider returns to it’s original position. is there some form of automix applied by the original composer because i cant see anything in cubase??? I want to remove this resetting thing!