When the LED is blue, the seventh is omitted from the mix, and the amplitude is increased
to compensate.
This is especially useful when using the Lead jack to create a melody separate from the
chord progression.
10. V/Oct
0V to 5V input for adjusting the root of the chord.
11. Lead
0V to 5V input that depends on the Mode setting.
12. Root
Audio output of the root of the Chord.
13. Third
Audio output of the third of the Chord.
14. Fifth
Audio output of the fifth of the Chord.
15. Seventh
Audio output of the seventh of the Chord.
16. Mix
Mix of Chord tones based on the Triad Control.
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