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DX21

Yamaha DX21

DX21
(image courtesy of Yamaha)

Released: 1985

MSRP: Y139,650 ($795US)

Synopsis:

Expands the DX9 Program memory and adds velocity (via MIDI) and bitimbral capabilities, while sacrificing some LFO waveforms. Operator EGs lose dedicated stages for ADDSR (pitch EG loses a stage). Architecture Class: FM.

Ebay Description:

The Yamaha DX21 is a 61 key (8 voice) bitimbral FM synthesizer, featuring 4 operators (8 algorithms) with dedicated (ADSDR) envelopes, a pitch envelope, an LFO (saw:up square triangle random waveforms), 160 presets (32 editable), tape interface, breath-control input, chorus, and MIDI.

Physical

Form Factor Dimensions Weight Audio Input Audio Output Communication Port Control Input Control Output Switch Input Power
61 keys W:909mm(35.8in) D:270mm(10.6in) H:82mm(3.2in) 8kg(17.6lbs) no stereo no breath-controller MIDI volume-pedal MIDI portamento sustain AC (7W)

Interface

Compatibility Multitimbral Memory Program Memory External Storage External Programming UI Input UI Output
B200 DS55 DX11 DX21 DX27 DX27S DX100 FB-01 TQ5 TX81Z V50 WT11 YS100 YS200 32 preset:128 user:32 tape MIDI-SysEx MIDI-SysEx mode based buttons LCD display

Architecture

Multitimbral Polyphony Unison Architecture
2 8 (split:4+4) no FM (4 operator, 8 algorithm)

Output

Effects Pan Modulator Volume Modulator Headphone
chorus no breath-controller MIDI-CC1 MIDI-CC2 MIDI-CC7 mod-wheel pedal velocity:MIDI-RX yes

Control

Arpeggiator Arpeggiator External Sequencer Sequencer Memory Sequencer External Continuous Program Change
no N/A no N/A N/A breath-controller mod-wheel pitch-wheel volume-pedal MIDI-CC1 MIDI-CC2 MIDI-CC5 MIDI-CC7 MIDI

Keyboard

Key Pressure Chord Memory External Control External Sustain Key Scaling Velocity Curves
no no MIDI:IN/OUT/THRU pedal MIDI yes 1

Source

Name Signal Class Waveform Octave Range Amplitude Modulator Harmonics Modulator Pitch Modulator Wave Assign Modulator
DCO1 digital sine 16-1/4' EG1 LFO FM breath-controller LFO MIDI-CC2 pitch-wheel PitchEG portamento no
DCO2 digital sine 16-1/4' EG2 LFO FM breath-controller LFO MIDI-CC2 pitch-wheel PitchEG portamento no
DCO3 digital sine 16-1/4' EG3 LFO FM breath-controller LFO MIDI-CC2 pitch-wheel PitchEG portamento no
DCO4 digital sine 16-1/4' EG4 LFO FM breath-controller LFO MIDI-CC2 pitch-wheel PitchEG portamento no

Envelope

Name Level Rate Loop Polarity Trigger Level Modulator Rate Modulator
EG1 sustain ADDR no no key key breath-controller MIDI-CC1 MIDI-CC2 mod-wheel key
EG2 sustain ADDR no no key key breath-controller MIDI-CC1 MIDI-CC2 mod-wheel key
EG3 sustain ADDR no no key key breath-controller MIDI-CC1 MIDI-CC2 mod-wheel key
EG4 sustain ADDR no no key key breath-controller MIDI-CC1 MIDI-CC2 mod-wheel key
PitchEG 3 3 no no key no no

LFO

Name Waveform Delay Polarity Sync Delay Modulator Level Modulator Rate Modulator
LFO saw:up square triangle random yes no key no MIDI-CC1 no
FM Models
GS1 GS2 CE20 CE25 DX9 DX21 CX5M CX5MII
DX27 DX100 DX27S FB-01 DX11 TX81Z WT11 YS100
YS200 B200 DS55 TQ5 V50 DX7 DX1 TX816
TX116 TX7 DX5 DX7IID DX7IIFD DX7II-Centennial DX7S TX802
FS1R