Think of Mangrove as a pulse generator rather than a standard VCO. Pitch controls how often a pulse is triggered. Formant sets the width of the pulses (lower = longer). Barrel sets the shape of the pulses as panel graphics indicate. Air sets the amplitude of the pulses with some progressively harder clipping.
One consequence of this behavior is that Mangrove’s output often has a strong DC offset.
The mode switch controls whether Formant width scales with Pitch. In constant wave mode, your per period waveform will be identical. In constant Formant mode the width of the pulses are unaffected.
Now here’s the special Mangrove flavor: If the falling edge of a pulse intersects a steeper leading edge of the next pulse, there will be a Formant width multiplication. Yum.
I don’t know if this helps you. I’m not sure I understand your problem… maybe post a video?
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