When recording or sequencing, to bounce tracks means to combine (mix) several tracks together and record them on another track.
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.
When there aren't enough tracks available on a multitrack tape recorder, it may be necessary to record a number of tracks on to one single track, freeing a number of channels for recording new sections. This is called bouncing down or "Ping Pong" recording.