vimsynth/modules/poly

POLY

A unison stack: several detuned copies of ONE voice, born stereo. This rack has no notion of true polyphony — a cable carries one voice, and that is the whole of what makes it modular — so this is what a synth means by 'polyphonic' when it cannot literally play several notes: a supersaw, a string section, a pad that sounds like more than one oscillator because it is. voices sets how many; detune spreads them symmetrically around the pitch you asked for, so more voices thickens the tone without ever bending it sharp or flat; spread fans them across the stereo field so the detuning is placed as well as heard.

inputs

Down the left edge of the card, top to bottom.

v/octpitch: Pitch. 1.0 = one octave up. Every voice in the stack tracks it, detuned symmetrically around exactly this note.
fmcv: Added to every voice's pitch, scaled by fm amt. Small values are vibrato across the whole stack at once.
detune cvcv: Added to the detune knob. An envelope here is a stack that widens as the note is struck — the unison version of a filter opening.

outputs

Down the right edge, in the same order.

laudio: The stack, left. Born stereo — spread fans the voices across the field, so summing this down to mono throws the width away.
raudio: The stack, right.

knobs

Left to right across the face — the dials in the picture.

tune-24 … 24 st= 0 st: Pitch offset in semitones.
wavesine · tri · saw · sqr= saw: The waveform every voice in the stack shares.
voices1 … 8= 5: How many detuned voices. One is a plain oscillator; the point starts around three.
detune0 … 1= 0.25: How far apart the voices sit, symmetrically around the pitch you asked for — the outermost two are at most a semitone apart at full detune. 0 puts every voice on exactly the same note.
spread0 … 1= 0.8: How far the fanned-out voices sit across the stereo field. 0 is mono; turned up, the detuning is placed as well as heard.
fm amt0 … 1= 0: How far the fm input moves every voice's pitch together.
level0 … 1= 0.7: Output level. The stack is normalised so more voices does not mean louder, but detuned voices drift in and out of phase — that drift IS the beating — and where they line up the peak is sqrt(voices) higher than the average. This is the headroom knob for that: turn it DOWN as you turn voices up.

The full reference — every parameter curve, the patching notes and the worked examples — lives in the manual: docs.vimsynth.com/modules/poly. In the app itself, :help POLY opens the same page without leaving the rack.