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 New LED Screen & Battery ($230)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($300)
Yamaha DX21 ($303.67)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($199)
Yamaha DX21 FM Programmable Algorithm Synthesizer - Serviced! ($379.59)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($400)
Yamaha DX21 Algorithmic Synthesizer, in Good Condition ($333.65)
Yamaha DX21 Playbook Tape ($43.37)
Yamaha DX21 with hard case, FM Digital Polyphonic Vintage Programmable Algorithm Synthesizer 1985 ($324.71)
Yamaha DX21 Keyboard Synthesizer w/Case ($485.82)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($225)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($150)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($220.80)
Yamaha DX21 Digital FM Synthesizer ($477.01)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($250)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($180)
Yamaha DX21 ($244.68)
OLED Display Upgrade - Yamaha TX7 - DX7 - DX9 - DX11 - DX21 - FB-01 ($162.35)
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Yamaha DX21 V1.5 OS EPROM! NEW! ($18.99)
1980s Yamaha DX-21 FM Keyboard Synthesizer ($355.15)
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 ($16.63)
Yamaha - DX7,DX9,DX21,DX27,RX-series - Phone jack ($6.90)
Yamaha DX-21 61 Key Digital FM Synthesizer ($270.16)
Yamaha DX21 complete Set tactile switch ($19.33)
Pushbuttons Tact Switches Full Set Of 42 for Yamaha Dx-21 Micro Switch ($12.68)
Yamaha Touche Clé DX27 DX 21 CS CE Series DX9 SK20 CS5 Replacement original Key ($6.56)
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