Live acoustics (per detected room)
Rooms are auto-detected from the wall graph — delete a wall to merge, add one to split. Area = shoelace · Vol = area×2.75m · f₁ = axial mode 343/(2·dim) · Schr = Schroeder · RT = Sabine estimate. Modes are the most geometry-sensitive readout. Export → SUKAR for a full ISM run.