Todd Marcus is an acclaimed bass clarinetist, composer and arranger. He’s also a community activist who has lived and worked in the Sandtown- Winchester neighborhood of West Baltimore for more than 20 years.He’s about to release a new CD, inspired by that historic neighborhood, called On These Streets: A Baltimore Story and recorded with a quintet of some of the area’s finest players. The disc includes compositions that portray the strengths and challenges of Sandtown-Winchester, and its release coincides with the anniversary of the violence and uprising that followed the funeral of Freddie Gray, three years ago Saturday. Todd and his band will be performing a free concert this Fri., Apr. 27 at 6 p.m. at the Harris-Marcus Center on Pennsylvania Ave. in Sandtown. It’s part of an exhibition by Jubilee Arts marking the 50th anniversary of the assassination of Martin Luther King, Jr. and the unrest that followed in Baltimore. On May 20, the Quintet will perform another free concert as part of the Community Concerts at Second series. You can also catch them on June 16 at Center Stage.