PRESS PHOTO BY ED COURRIERBakithi Kumalo plucks the strings of his fretless Kala acoustic-electric ukulele-bass. The Grammy Award-winning musician who lives in Bethlehem presented a performance and talk at the Allentown Art Museum Sept. 21. His repertoire included traditional South African songs sung in Zulu. Kumalo answered audience questions about his experience as a bassist for Paul Simon's Copyright - &Copy; Ed Courrier