Part of the adventurous Music Mondays series, this concert pairs a violinist and bass-baritone — pioneers both — in music that ranges from Bach and Beethoven to Julia Wolfe and Missy Mazzoli to a hymn and a Korean lullaby. Oh, and the premiere of a new version of “Give Me Back My Fingerprints,” by the Pulitzer Prize winner Du Yun. All that for free.musicmondays.org