Existing comment:
The artwork is called Community Rhythms. The sign says:

Community Rhythms
Alfred J. Smith
with assistance from
Howard University Art Department students including
Daryle Halbert, Troy Johnson, and Charles Nelson
This mural was commissioned through
the National Museum of American Art and
the Art in Public Places Program of
the DC Commission on the Arts and Humanities.
Accepted user comment:
(none so far)
Proposed user comment: