Ping-pong recording

Ping-pong recording (more commonly known as "bouncing tracks" or "bouncing down") is a multitrack audio recording technique which takes advantage of magnetic tape’s rewritable nature in order to circumvent its limited number of tracks. The process involves combining multiple previously recorded signals onto either a single track (monophonic) or a pair of tracks (stereo), thus freeing up additional tracks for overdubs. The process can be continued indefinitely, although additional machine noise, tape hiss, and tape saturation will be added to the recording with each consecutive bounce.

The technique has been commonly used in analog music production prior to the advent of digital recording technologies which allow for a near infinite number of individual tracks.