 "Multiple SIDosis", written by, directed by and starred Sid Laverents, features as many as twelve split-screen "copies" of Laverents playing various conventional and improvised instruments simultaneously.The separately-recorded performances of the various parts were overdubbed and visually composited to create the final piece.The overdubbing technique has been used before and since in professional recording studios, to allow a single performer to create an entire multi-instrument song.