After recording two tracks in Live, I replay them while turning the pan knob for track one on my APC40 controller. Suddenly, the clips on the tracks turn a shade of red and there is no sound. Thinking I must have accidentally touched another knob on the APC40 which caused the problem, I click EDIT to see what commands were last executed so that I can undo the appropriate command. Well, there is just the last recording and there is nothing irregular.
I would appreciate any ideas or suggestions.