Yamaha PSR-550

The Yamaha PSR-550 is a 61-key digital keyboard synthesizer released in the early 1990s. It was used by many professional musicians, including the likes of Herbie Hancock, George Duke, and Chick Corea. The PSR-550 features a wide range of sounds, including piano, organ, strings, brass, and percussion. It also has a built-in sequencer, allowing users to record and playback their own compositions. Additionally, the PSR-550 has a variety of effects, including reverb, chorus, and delay.