Chris Grymes’ Open G Performance Series will present “Jeremy Gill, Composer Portrait” at Brooklyn’s National Sawdust on Apr. 7, 2019. The concert will celebrate the bicentennial of the great American poet Walt Whitman with music inspired by his words. “Whitman Portrait” (2014) will feature sopranos Deborah Lifton and Kristin Sampson, mezzo-soprano Rachel Calloway, tenor Dominic Armstrong, baritone Jorell Williams, bass-baritone {…}