I wanted to chime in on the sound Quality of these AF titles. I don't disagree with folks comments, but Thank God these titles were Not sonically sterilized of what the original Quad Masters are and were. We now have an absolute "positive" IMHO of what the actual Quad Master was and can now go back and play CD-4 or SQ records or Q8, Q4 tapes and see how good or not, our vintage equipment was/is.
IMHO overall these AF Quad series of surround titles are Mastered wonderfully. They sound analogue-ish even though digital and seems to be as close as one can get as what it was like in the studios where they were mixed in the 1970s.