Who cares about PD... we are talking music.
Carry on.
I got to hear One Of These Days 'live' (when Meddle was out), on the FM, in my teen-age room . . . with the beads . . . and the lights down. Fully half of an hour show, one song, blew me away and was ever after an enthusiast.
Jeff, my childhood mentor, mentioned before, the one who snuck into the Beatles concert at Crosley Field, former home of the Reds, was very excited when he got his copy of Sgt. Pepper . . . I'm pretty sure I heard it withing a few days of it's release, so that must have been a mono copy. It's funny, that you bring up the 'engineering' that went into later releases. I never thought about it, but the thing never has sounded as 'bright'??, as those first few listens. I always thought is was familiarity that dulled the experience.
Vinyl and Glowing Tubes into a Folded Corner Horn... Mono indeed. Stereo is a sort of sonic illusion. Anybody gonna admit to having a quad system? And today, what, 5 channels???