Association for the Advancement of Creative Musicians (AACM) http://www.aacmchicago.org/

The Association for the Advancement of Creative Musicians (AACM) has, since 1965, exercised an internationally renowned influence on the development of experimental music. With chapters in Chicago and New York, the composite output of AACM members has explored new and influential ideas about timbre, sound, collectivity, extended technique, instrumentation, intermedia, computer music technologies, installations, and kinetic sculptures.