Korg M1 is a synthesizer workstation released by Korg in 1988. It was one of the first widely used digital synthesizers and was used by many popular musicians, including Michael Jackson, Madonna, and U2. The M1 is a combination of a synthesizer, a sampler, and a sequencer, allowing users to create and manipulate sounds. It features a 61-key keyboard, 16-voice polyphony, and a variety of sound-generating and editing capabilities. It also has a built-in sequencer, allowing users to record and edit their own compositions. The M1 is capable of producing a wide range of sounds, from realistic acoustic instruments to complex electronic sounds.