Yamaha DX21

The Yamaha DX21 is a digital synthesizer released by Yamaha in 1985. It was one of the first affordable digital synthesizers and was used by many popular musicians, including Depeche Mode, New Order, and The Cure. The DX21 is a four-voice polyphonic synthesizer with two oscillators per voice. It features a variety of waveforms, including sawtooth, pulse, and noise, as well as a built-in chorus effect. It also has a built-in arpeggiator and a variety of modulation options, including envelope, LFO, and portamento. The DX21 also has a built-in sequencer and a variety of preset sounds.