Musically, the trio was heavily influenced by the intricate vocal harmonies of .
: Quadraphonic recordings used four independent audio channels to create a surround-sound effect, a precursor to modern home theatre systems. Marvin, Welch & Farrar - Second Opinion (QUAD D...
: Original UK pressings and used Canadian imports (1972) can be found at stores like The Record Centre and Aux 33 Tours. Musically, the trio was heavily influenced by the