With an elastic, everchanging lineup, the New York-based contemporary chamber collective, formed in 2005, have an exploratory nature. Their diverse repertoire is at times complex and thrilling but more often calm and meditative. Founded and led by the Brooklyn cellist Clarice Jensen, the American Contemporary Music Ensemble (often abbreviated as ACME) compose, commission, and interpret intricate, boundary-pushing material, and have presented important work by such luminaries of the modern classical world as Max Richter -- 2015's ambitious Sleep project -- and Jóhann Jóhannsson...