Q10U1A1D2R1O1P3H4O1N1I1C3
29 points
QUADROPHONIC is validvalid
quadraphonic
of, relating to, or using four channels for the transmission, recording, or reproduction of sound, also QUADRAPHONIC, QUADRIPHONIC
quadraphonic
of, relating to, or using four channels for the transmission, recording, or reproduction of sound, also QUADRAPHONIC, QUADRIPHONIC