Melody’s fine, but the real heartbeat of music is percussion. Kodo, founded in 1981, explores the expressive sounds made on traditional Japanese taiko drums. The group gets its name from the Japanese word for heartbeat, but “kodo” also means “children of the drum,” referring to a mother’s heartbeat. The group tours relentlessly — some 3,700 performances on all five continents in the past quarter-century — so here’s your chance to catch them.