Yamaha PSS-21

The Yamaha PSS-21 is a portable keyboard synthesizer released in the early 1980s. It was used by many popular musicians, including Michael Jackson, Prince, and Duran Duran. The PSS-21 is a monophonic synthesizer with a built-in speaker and a two-octave keyboard. It has a variety of features, including a built-in rhythm machine, a pitch bend wheel, and a built-in chorus effect. It also has a built-in arpeggiator and a variety of preset sounds.