| Form Factor | Keyboard |
| Signal Path | Digital Hardware (including Analog Connections) |
| Notes | Expandable FM synthesizer. This synthesizer were powered by Yamaha's second-generation 4-operator FM engine |
| Form Factor | Keyboard |
| Signal Path | Digital Hardware (including Analog Connections) |
| Notes | Expandable FM synthesizer. This synthesizer were powered by Yamaha's second-generation 4-operator FM engine |