Techno artists reworking Ravel’s Bolero with its relentless snare drum vamp is an idea so obvious as to not really raise many hopes in and of itself. However, the people doing it here are Detroit wonder Carl Craig and Hamburg via Berlin musical (and literal) aristocracy Moritz Von Oswald, and they really take it to a sublime place. Over a single stretch of 40 minutes (divided into an intro and four “movements”) they stretch it, bend it, and boil away its orchestral elements until by the end only techno haunted by a ghost of the original is left. Their take on Ravel’s orchestration of Mussorgsky’s Pictures at an Exhibition has just as much blissful hypnosis, to boot.