In 1965 eight guys decided to start a free-improv group: free to the point of building their own instruments, which they decided couldn’t be set up to produce specific pitches. The band got together once a week with their electric kazoos and kludged-together guitars. Their vocalist, a schoolteacher, banged on cooking pot and bellowed hilariously about stupidity, destruction and Canada. They didn’t treat what they were doing as an advanced, visionary form of experimental music, but as a big, stupid, fun, ecstatic noise. By the ’90s many artists recognized Nihilist Spasm Band as ancestors… and 50 years after they started the surviving members of the band still play every Monday night while their children haunt loft spaces the world over.