As we stream songs so easily from the phones in our hands, it may seem difficult to picture a time when that music would vanish. And if James Taylor is not your favorite jam and you’re having a hard time understanding the importance of this loss, imagine other great voices that reflect the soul and history of America: Aretha Franklin, Woody Guthrie, or your grandfather’s favorite, Louis Armstrong. Those amazing trailblazers were inspired by early spirituals, gospel music, and ballads that go back to Europe.