SAS-20
| Manufacturer | Korg |
| Function | Synthesizer |
| Produced | 1983 |
| Country | Japan |
| Form Factor | Keyboard |
| Signal Path | Digital Hardware (including Analog Connections) |
| Notes | was Korg’s first arranger keyboard. A built-in computer analyzed the melody played on the keyboard, and generated a complex accompaniment. This was the world’s first auto-accompaniment function of this kind added to a keyboard. Also, a more traditional chord recognition system was included. |