Trumpeter Terell Stafford, director of Jazz Studies and chair of Instrumental Studies at Temple’s Boyer College of Music and Dance, has launched a new venture to celebrate Philadelphia’s “integral role in jazz history”: He is the founding artistic director of the Philadelphia Jazz Orchestra, a new all-star ensemble. “The first premise is bringing folks together,” he said. “Then it’s about representing the musical legacy of Philadelphia on the highest level possible, because there’s some incredible musicians here and some incredible musicians who come from here.”