Rhino is a respected name in the audiophile community, renowned for their exceptional and quality catalog releases. Following the success of The Doobie Brothers: Quadio (2020) and Chicago Quadio (2016) sets, Rhino will release a slew of seminal 1970s albums recorded in quadraphonic sound. Quadraphonic sound, or 4.0 surround sound, utilizes four audio channels connected to four speakers positioned at the corners of a listening space. The multi-tracked audio is mixed dimensional, immersing the listener in an expansive soundscape.