Yamaha PSR-28

Yamaha PSR-28 is a portable keyboard synthesizer released by Yamaha in the late 1980s. It is a 61-key keyboard with a built-in sequencer and a variety of sounds and effects. It has been used by many professional musicians, including Herbie Hancock, Chick Corea, and John McLaughlin.

The PSR-28 has a variety of features, including a built-in sequencer, a variety of sounds and effects, and a built-in arpeggiator. It also has a built-in rhythm machine, a pitch bend wheel, and a modulation wheel. It also has a built-in MIDI interface, allowing it to be connected to other MIDI devices. Additionally, it has a built-in microphone input, allowing it to be used as a vocal processor.