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 Programmable Algorithm Synthesizer 1985 - Black ($300)
YAMAHA DX21 w/ Original Box & Manuals ($357.79)
Yamaha DX21 FM Synth ($106.57)
Yamaha DX21 Programmable Algorithm Synthesizer ($250)
Yamaha DX21 FM Programmable Algorithm Synthesizer 1985 - Black ($329.59)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($400)
Yamaha DX21 ($296.56)
Yamaha DX21 Digital Synthesizer For Parts Or Repair #1136 ($118.99)
Yamaha DX21 Digital FM Synthesizer ($471.20)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($250)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($306.52)
Yamaha DX21 Keyboard Synthesizer w/Case ($490.35)
Yamaha DX21 Playbook Tape ($42.85)
Yamaha DX21 Programmable Algorithm Synthesizer 1985 - Black ($263.67)
Yamaha DX-21 Original US Power Supply Assembly. Works Great ! ($49)
OLED Display Upgrade - Yamaha TX7 - DX7 - DX9 - DX11 - DX21 - FB-01 ($99.41)
Yamaha DX21 W/ Original Bag 100V Made in Japan MIJ ($295)
Yamaha DX21 V1.5 OS EPROM! NEW! ($18.99)
YAMAHA DX9 DX21 DX27 Original Top-C Key. ($14.99)
1980s Yamaha DX-21 FM Keyboard Synthesizer ($358.46)
NEW Yamaha Replacement Data Slider for DX7, DX9, DX11, DX21, DX27, DX100 ($17.95)
Yamaha DX9, DX21, DX27, DX100, FB01 Cassette Tape Interface cable 1980 ($38.45)
Yamaha DX21 Firmware v. 1.5 OS EPROM Update Upgrade DX-21 Rom ($16.42)
Yamaha DX21 complete Set tactile switch ($19.09)
Pushbuttons Tact Switches Full Set Of 42 for Yamaha Dx-21 Micro Switch ($12.52)
YAMAHA DX-21 Synthesizer Modulation Wheel Assembly. ($29)
Yamaha Touche Clé DX27 DX 21 CS CE Series DX9 SK20 CS5 Replacement original Key ($6.48)
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