Beginning as a student, the composer Nico Muhly worked for eight years as an intern, archivist, and editor for veteran minimalist composer Philip Glass. Lesser Known is the product of Muhly’s discoveries during that formative experience: his own new arrangements and reinterpretations of the elder composer’s chamber works, film scores, operas, and theater pieces. Muhly performs on keyboards and is joined by a cohort of his esteemed new-music peers, including flutist Alex Sopp and violist and podcast host Nadia Sirota.