The library's subscription to Alexander Street Press makes available 170,000 tracks of music. Find out how you can listen without charge over the Internet through speaker or headphoneseither in the library or from home (with your library card number). The three online libraries available are a Classical Music Library, the Smithsonian Global Sound and African American Song. Music in these three libraries ranges from medieval to contemporary to avante-garde and from folk to holiday tunes and world music from around the globe as well as blues, jazz and gospel.