In their 1968 psychedelic pomp, The Moody Blues played blissful San Francisco pop with pillow-soft harmonies and occasional mournful shifts into British realism. They float away on the dandelion melodies of “Legend of a Mind”—on the updraft from Mike Pinder’s orchestral Mellotron strings—and play the sky-dazzled hippies on “Ride My See-Saw” and “Voices In the Sky.” Then they return to earth with the perky music-hall clip of “Dr. Livingstone, I Presume” and the proto-prog, tragic melancholy of “The Actor.”