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General| Type | Digital Synthesizer |
|---|---|
| Synthesis Type | FM (Frequency Modulation) |
| Polyphony | 8 voices |
| Effects | Chorus |
| Year released | 1985 |
| Oscillators | 4 operators |
| LFO | 1 |
| Keyboard | 61 keys |
| Memory | 32 patches |
| MIDI | In, Out |
| Outputs | Stereo |
Describes how to enter the internal test mode of the DX21 and automatically proceed.
Tests RAM, MIDI IN/OUT, and cassette interface functionality.
Checks A/D converter inputs and footswitch controls based on LCD prompts.
Explains general MIDI transmission rules, conditions, and data types.
Specifies the structure for voice data parameters using the VMEM format.
Summarizes MIDI functions, transmitted/recognized messages, and remarks for the DX21.
