| Model ID | 2720 |
| Form Factor | Keyboard |
| Signal Path | Analog Hardware |
| Channels | 1 Voice (Monophonic) |
| Links | Wikipedia · Service Manual at Internet Archive |
| Notes | The ARP Pro Soloist would eventually be reintroduced as the updated Pro-DGX featuring momentary digitally-latched push button voice selector switches with LED status indicators, rather than toggle switches. It would remain in production until the company's demise in 1981. |