1) Diffuse light that has been reflected from the stage, walls, cyc etc. 2) Describes the fast in/out movement of "bouncing" flown house tabs, used during curtain calls. This can also apply to the fast blackout/lights up cues that happen at curtain calls. 3) This facility is available on many multitrack tape machines. Describes the mixing down of multiple sounds from different tracks onto one track, hence freeing up the other tracks to be re-used. Allows many sounds to be recorded onto one tape.