Rhino’s Quadio series has recently announced its latest batch of four titles, and as usual, they comprise a quartet of eclectic titles from the 1970s.  Two singer-songwriters – James Taylor and Bread’s David Gates – are joined by soul-jazz titan Herbie Mann and the rockers of The James Gang.  Each Blu-ray Audio Disc in the Quadio series includes the original four-channel quadraphonic mix with a high-resolution 192/24 stereo mix, with both sourced from the original analog tapes.  (The lone exception here is the Herbie Mann quad mix, which was sourced out of…