AudioGraphSpectrum RTA tap (audio passes through): bands log-spaced band magnitudes (dB, 20 Hz..Nyquist, max 64 bands) per window, as band_0..band_{N-1} readings plus a bands count. A full-scale tone reads ~0 dB in its band. Field Type Repeated Description input uint32 window_ms double bands uint32 Member of Message Description AudioGraphNode One node in the graph. (Extended one op at a time.) AudioGraphSpectral AudioGraphState