The Dutton Vocalion label has announced its first batch of hybrid SACD releases (playable on all CD players) for 2021 including another group of long-out-of-print quadraphonic surround mixes. First up is a three-for-one release from Ian Hunter and Mott the Hoople.  The first disc of this 2-SACD set presents 1974’s The Hoople (the band’s highest charting album in the U.S.) in stereo and quadraphonic; followed by a stereo-only presentation of 1972’s All the Young Dudes (featuring David Bowie’s classic title anthem) split across both discs; and concluding with the stereo-only Mott (their…