DGX-640
| Manufacturer | Yamaha |
| Function | Synthesizer (Digital Piano) |
| Produced | 2010 |
| Country | Japan |
| Form Factor | Keyboard |
| Signal Path | Digital Hardware (including Analog Connections) |
| Manufacturer | Yamaha |
| Function | Synthesizer (Digital Piano) |
| Produced | 2010 |
| Country | Japan |
| Form Factor | Keyboard |
| Signal Path | Digital Hardware (including Analog Connections) |