On April 9, 2021, Brooklyn Art Song Society will present the first program in its “New Voices Festival: Past/Present/Future,” featuring world premieres by composers Katherine Balch and Brad and Doug Balliett. First will be the Balliett Brothers, with a re-setting of Schubert’s “Schwanengesang” that draws upon their idiosyncratic styles of composition and performance. Katherine Balch’s “estrangement” will view Schumann’s “Dichterliebe” {…}