Del McCoury Band has once again proven that they are the gold standard of bluegrass. It’s difficult to imagine anyone walking away from Del’s incredible voice and the music that he creates with his band. If you’re looking for some missteps on the group’s latest album, The Streets of Baltimore, then good luck finding them. The 13 tracks avoid any sour notes. After releasing Old Memories, McCoury’s tribute to his former band leader Bill Monroe, and collaborating with the Preservation Hall Jazz Band on American Legacies, Del and his boys have settled comfortably back into their relaxed, free-form twang. On this album, the group turns Jerry Lee Lewis’ famed “Once More with Feeling,” featuring dance-hall keys wound around fiddle, the country-steeped, crossover nugget “Too Many Rivers,” and a bluegrass treatment of the doo-wop classic “Butler Brothers.” Nancy Dunham