Yamaha GX-1

The Yamaha GX-1, first released as Electone GX-707, is an analog polyphonic synthesizer developed by Yamaha as a test bed for later consumer synths. The GX-1 has four synthesizer "ranks" or manuals, called Solo, Upper, Lower and Pedal, plus an analog rhythm machine.

Read more about Yamaha GX-1:  Overview, Popular Music