Analog sequencer

An analog sequencer is a music sequencer constructed from analog electronics, invented in the first half of the 20th century.

Raymond Scott designed and constructed some of the first electro-mechanical music sequencers in the 1940s. The first electronic sequencer was invented by Raymond Scott, using thyratrons and relays. Incidentally in 1951, computer music was started from the music sequencing, and later its applicable fields were expanded into the music composition and sound generation. However, the RCA Mark II Sound Synthesizer in 1957 was still indirectly controlled via punch-tape system similar to piano rolls, a kind of mechanical sequencer.