The original MG-1 included a rudimentary poly section that operated independently of the Tone Sources. The good news is that it allowed chords to be played on an otherwise mono (one-note-at-a-time) synth. The bad news is that it was extremely limited - its only control was a single level slider in the mixer section. It could only produce a square wave, its octave range was fixed, and its pitch could not be modulated. As you might guess, this made for a pretty blah poly synth experience.
With that in mind, we expanded the Poly section's capabilities considerably with a few additions. We added a saw wave, a three-position range selector, and a modulation amount slider in the Modulation section. This may not seem like a much, but trust us, these simple additions make a huge difference in the Poly section's usability.
Note that the Poly section can sound a maximum of 32 simultaneous notes.
Octave- Sets the basic pitch range of the Poly section. Note that the Master Transpose switch at the left of the keyboard also affects the Poly section range.
Wave Shape- Allows selection of sawtooth or square wave.
Master Tuning Control
Polyphony- The second knob over at the top left of the panel acts as a master tuning control for the Poly section with a range of just over +/- 300 cents. This is also useful for subtle chorusing/detuning of the Poly section against the Tone Sources.