King Crimson

The eighth iteration since 1969 of skysaw guitarist Robert Fripp’s prog-rock playpen is a septet featuring a three-drummer front-line, with Fripp, longtime bassist Tony Levin, saxophonist Mel Collinsm, and guitarist Jakko Jakszyk bringing up the rear. Early shows have been bookeneded by “Lark’s Tongue in Aspic” and concentrate on early-’70s material, which is good news for hard-core fans of Crimson’s magic muscularity.

Sept. 18-21, 8 p.m., 2014