DX21
| Manufacturer | Yamaha |
| Function | Synthesizer |
| Produced | 1985 |
| Country | Japan |
| Form Factor | Keyboard |
| Signal Path | Digital Hardware (including Analog Connections) |
| Dimensions | 909 mm x 82 mm x 270 mm |
| Weight | 8.0 kg |
| Power | 7 watts |
| Notes | 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. Keyboard: 61 keys Polyphony: 8 notes Preset Patches: 128 User Patches: 32 User Performances: 32 Screen: 16x2 character LCD |