King Crimson play June 12–13 at the Moore Theatre. Credit: TONY LEVIN

King Crimson play June 12–13 at the Moore Theatre.

King Crimson plays the Moore Theatre tonight and tomorrow night. TONY LEVIN

Let’s say you lived in a horrific world in which you could listen to only one English prog-rock group. In such a grim scenario, you should make it King Crimson. Granted, Yes, Genesis, Soft Machine, Emerson, Lake & Palmer, McDonald & Giles, Egg, Gong, Caravan, Gentle Giant, Gnidrolog, and others of their ilk have a lot to offer the adventurous rock listener. But none of these outfits has Robert Fripp in their ranks. A master guitarist and sonic conceptualist on the level of collaborator Brian Eno, Fripp is a once-in-a-half-century musician who has guided King Crimson through many fascinating permutations over almost that length of time.

Dave Segal is a journalist and DJ living in Seattle. He has been writing about music since 1983. His stuff has appeared in Gale Research’s literary criticism series of reference books, Creem (when...