The Mixer section is where all MG-1 Plus signals are mixed together before going to the Master Volume control and onto the output.
Tone One- Sets the level of Tone Source One.
Tone Two- Sets the level of Tone Source Two.
Noise- Sets the level of the Noise generator. We haven't mentioned the Noise generator up to this point, because it has no other controls, but it creates random noise containing all frequencies at relatively equal amplitude. Like the Tone Sources, the Noise generator is routed through the filter and amplifier.
Bell Tone- Sets the level of MG-1 Plus' pseudo ring mod section*. This multiplies the signals of Source One and Tone Source Two together, typically resulting in a metallic tone with inharmonic overtones often used to recreate pitched percussion instruments such as bells and chimes. Manipulate the Tone Source Octave controls and Tone Source Two's Detune slider to best hear its effects.
Poly- Sets the level of the Poly section. It does not want a cracker.
Master Volume and meter- This isn't in the Mixer section, but it sets MG-1 Plus's final volume. The meter is a five-LED affair and should be set like any other meter; it should nominally sit around the third and fourth LED from the bottom.