Jana Rush: “Painful Enlightenment”

The Chicago footwork producer Jana Rush began making records in the mid-nineties, for the early house-music label Dance Mania, but her first proper album, “Pariah,” appeared only four years ago. Her second, “Painful Enlightenment,” shows how widely one can stretch the basic footwork formula of ultra-fast, distended rhythms mixed with surrealist daubs of samples. On “Moanin’,” Rush chops up a jazz-saxophone run and amplifies its intensity. Similarly, a querulous piano adds dimension to “Mynd Fuc,” a provocative, cinematic flurry of percussion and effects.