Yamaha DX21
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The Yamaha DX21 is a digital controlled bi-timbral programmable digital FM synthesizer with a four operator synth voice generator which was released in 1985 by Yamaha. It uses sine wave-based frequenc
A Yamaha DX21 synthesizer shown along with various 90s and 2000s-era groove machines.
A DX21 synthesizer being played alongside a Korg Poly-800 and Roland TR-909.
Yamaha YM2164
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The Yamaha YM2164, a.k.a. OPP, is an FM synthesis sound chip developed by Yamaha, an enhanced version of their YM2151. The OPP was used in various MIDI-based synthesizers by Yamaha - DX21, DX27, DX100
Yamaha DX21
…sequencer, or other MIDI-compatible device. The CPU is a Hitachi HD63B03XP, a derivative of the Motorola 6803, and the sound generation chip is the YM2164 (OPP), a variant of the YM2151 (OPM). The DAC is a YM3012. The instrument has an un-backlit LCD panel which indicates the name of the voice or sound and…
Yamaha YM2164