 The orchestra also hosts the Symphony Ball, for decades a leading annual social event in the Lehigh Valley.The Allentown Symphony has had only three music directors throughout its history.Emmy-nominated Donald Voorhees, noted conductor of "The Bell Telephone Hour" and "Cavalcade of America" radio and television show orchestras, served as the music director of the Allentown Symphony for over thirty years (1951 to 1983).