Os Ensemble is a group of adventurous and committed young singers who interpret and transform new works for voice. Since 2017, Os Ensemble has worked closely with emerging and established composers across many styles. With an inaugural commission by composer Eve O’Donnell, Os Ensemble made its performance debut at leading arts incubator National Sawdust led by conductor Raquel Acevedo Klein.

Over the course of 15 years, Raquel Acevedo Klein has been a member and subsequent conductor for the Grammy Award-winning Brooklyn Youth Chorus. She has participated in the premieres of works by Philip Glass, John Adams, Louis Andriessen, Nico Muhly, Caroline Shaw, Bryce Dessner, Missy Mazzoli, Shara Nova, and Lisa Bielawa, to name a few. Raquel has performed at Carnegie Hall, Lincoln Center, Radio City Music Hall, Town Hall, Barcalay’s Center, United Palace, St. Ann’s Warehouse, Celebrate Brooklyn! and elsewhere. She has recorded and performed with the likes of Glen Hansard, Arcade Fire, The Knights, the NY Philharmonic, and the American Composers Orchestra among others.


25 October 2018

New Opera Premiere

In February 2019, Os Ensemble will begin a series of performances workshopping a new opera by composer Alex Weiser.

1 October 2018

Mile-Long Opera

Os Ensemble premieres innovative opera about New York City by Pulitzer Prize-winning composer David Lang.

6 March 2018

Cuban Magical Realism

On April 26th, Os Ensemble will perform the US premiere of works by world-renowned composer Guido López-Gavilán.

15 Sep 2017

Os Ensemble Premieres New Work in Debut Performance

Os Ensemble has partnered with composer Eve O'Donnell in premiering the  a series of vocal chamber works inspired by elements of the environment: earth, wind, fire, and water.