Optional ReadonlydivergenceCentre divergence, 0 (hard discrete — a centred source is entirely in C) … 1 (full
phantom — degenerates exactly to panGains, no C at all). Absent reads as 1: a bus that
becomes format:'lcr' with no per-source divergence set yet reproduces today's stereo image,
never silently snapping every source to hard-C.
Readonlypan−1 (hard left) … 0 (centre) … +1 (hard right) — the same scalar panGains takes.
A source's pan state feeding an LCR-format bus: the familiar −1…0…+1 scalar plus divergence.