From the Chicago Reader:
Chicago’s influential Association for the Advancement of Creative Musicians celebrates its 50th anniversary this year. Many of the organization’s surviving founders have spread out across the U.S., and its influence spans the globe, but our city’s importance to its formation is indisputable. Throughout the year, musicians from every chapter of the AACM’s history have been playing celebratory concerts around town, and the 2015 Chicago Jazz Festival will close with a performance of the Experimental Band, led by pianist and AACM cofounder Muhal Richard Abrams and featuring key early members such as Roscoe Mitchell, Henry Threadgill, Wadada Leo Smith, Amina Claudine Meyers, and George Lewis. At the DuSable Museum of African American History, the exhibit “Free at First: The Audacious Journey of the Association for the Advancement for Creative Musicians” runs through September 6. And the biggest AACM event of the year might be “The Freedom Principle,” which opens at the Museum of Contemporary Art on Saturday and closes November 22.