NOT KNOWN FACTUAL STATEMENTS ABOUT AMBIENT MUSIC

It was almost certainly inescapable that Eno would sooner or later collaborate with Kevin Shields of My Bloody Valentine, a fellow wielder of edgeless, untraceable, overwhelming sounds. “Only Once Away My Son” will be the instrumental 50 percent of a 2018 one — its lyrics seem in the opposite keep track of, “The Weight of History” — and