Yamaha PSS-51

The Yamaha PSS-51 is a portable keyboard synthesizer released in the early 1980s. It was used by a variety of artists, including the Pet Shop Boys, Depeche Mode, and New Order. The PSS-51 features a built-in speaker, a built-in rhythm machine, and a built-in sequencer. It also has a variety of sounds, including bass, strings, brass, and percussion. It has a two-octave keyboard and a variety of controls, including a pitch bend wheel, a modulation wheel, and a sustain pedal.