Toshi Nakamura/English + Keith Rowe/Taku Unami

Anyone in need of a crash course covering the essentials of electroacoustic improvisation could do far worse than to turn up for tonight's two sets, in which two of the scene's most prominent figures—guitarist Keith Rowe and no-input mixing-board player Toshimaru Nakamura—work in familiar combinations that should still yield no shortage of surprise and satisfaction.