The DX21 is a 4-operator FM synthesizer and one of the most limited of the DX line due to the keyboard's lack of both velocity and aftertouch sensitivity. It has 8 different algorithms available, similar to the other 4-operator Yamaha FM synths, and is patch-compatible with some of the other 4-operator devices, such as the DX27, DX100, and TX81Z.
Year Released: 1985
MSRP: 895.00 USD
Keyboard: 61 keys
Polyphony: 8 notes
Preset Patches: 128
User Patches: 32
User Performances: 32
Screen: 16x2 character LCD
Power Consumption: 7 watts
Dimensions: 909 mm x 82 mm x 270 mm
Weight: 8 kg
Yamaha DX21 61-Key Digital Programmable Algorithm Synthesizer ($229)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($199)
Yamaha DX21 ($307.23)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($400)
Yamaha DX21 Algorithmic Synthesizer, in Good Condition ($338.72)
Yamaha DX21 Synth - SERVICED and CLEANED! ($225)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 ($337.59)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($300)
Yamaha DX21 New LED Screen & Battery ($230)
Yamaha DX21 Programmable Algorithm Synthesizer ($319.99)
Yamaha DX21 Keyboard Synthesizer w/Case ($493.83)
Yamaha DX21 Playbook Tape ($44.03)
Yamaha DX21 with hard case, FM Digital Polyphonic Vintage Programmable Algorithm Synthesizer 1985 ($329.18)
Yamaha DX21 Digital FM Synthesizer ($484.25)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($250)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($195)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($275)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($150)
Yamaha DX21 ($200)
Yamaha DX21 Synthesizer (San Antonio, TX) ($229.99)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($223.84)
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Yamaha DX21 W/ Original Bag 100V Made in Japan MIJ ($295)
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1980s Yamaha DX-21 FM Keyboard Synthesizer ($361)
NEW Yamaha Replacement Data Slider for DX7, DX9, DX11, DX21, DX27, DX100 ($17.95)
Yamaha DX21 Firmware v. 1.5 OS EPROM Update Upgrade DX-21 Rom ($16.88)
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Yamaha DX21 complete Set tactile switch ($19.62)
Pushbuttons Tact Switches Full Set Of 42 for Yamaha Dx-21 Micro Switch ($12.87)
Yamaha Touche Clé DX27 DX 21 CS CE Series DX9 SK20 CS5 Replacement original Key ($6.66)
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