American Composers Orchestra will open its 2021-22 season September 28 with a “Welcome Back Family and Friends” chamber concert at the DiMenna Center for Classical Music in Manhattan. ACO musicians including violinist Karen Kim, cellist Eugene Moye, pianist Christopher Oldfather, flutist Laura Conwesser, clarinetist Liam Burke, and percussionist Javier Diaz will perform music by Augusta Gross, Karen Lefrak, Jonathan Bailey Holland, Steven Gerber, Alvin Singleton, Melinda Wagner, Edward Thomas, and Robert Beaser. Many of the composers are close to the orchestra, including current and former ACO board members. “This concert is a chance for us to gather and share music by composers near and dear to ACO’s past, present, and future,” says Artistic Director Derek Bermel. All audience members will be required to show proof of vaccination against COVID-19 with a vaccine authorized by the World Health Organization or the Food and Drug Administration and must wear face coverings in accordance with current CDC guidelines. Additional season concerts include an October 16 event featuring ACO commissions by Ray Lustig and Trevor New, co-presented with Groupmuse Foundation, at New York City locations to be announced; and a March 25, 2022 concert at Carnegie Hall led by Marin Alsop and featuring violinist Jennifer Koh. The season will conclude on May 7 with “The Gathering: A Collective Sonic Ring Shout” at the Apollo Theater, co-presented by ACO and the Apollo and co-curated with National Black Theatre, in partnership with Gateways Music Festival and Harlem Chamber Players.