From the jump, Muhsinah (pronounced Moo-seen-ah) has benefited from the Internet age and the ability for her music to strike a chord with whomever was paying attention to it. As the word and MP3s spread among Web audiofiles, more listeners became fans and she built an impressive list of supporters with her The Oscillations EP in 2005. The Duke Ellington School of the Arts and Howard University jazz studies grad from upper Northeast D.C., who…