The instrumental ambient rockers of Mono have come all the way from Tokyo to redefine what rock music can sound like. Their poignant songs find more common ground with classical music than with most modern output, and only after seeing it with your own eyes can you believe that just three men and one woman are capable of creating such a dynamic and beautiful, jarring and explosive wall of sound. With High on Fire, Panthers, and Coliseum. (Crocodile, 2200 Second Ave, 441-5611. 8 pm, $16 adv/$18 DOS, 21+.)