Early Recording
  American Roots
  Jazz in New Orleans - ODJB, King Oliver, Jelly Roll Morton
  Female Blues - Ma Rainey, Bessie Smith
  Rural Blues - Blind Lemon Jefferson, Charley Patton
  Old-Time Folk/Country - Charlie Poole
  Jazz in Chicago - Louis Armstrong, Bix Beiderbecke
  Jazz in Harlem - Duke Ellington, Luis Russell
  Blues in Chicago - Big Bill Broonzy, Tampa Red, Memphis Minnie
  Territory Bands - Bennie Moten, Count Basie
  Swingtime Revivals - Benny Goodman, Muggsy Spanier
  Small Group Swing - Louis Jordan
  Western Swing - Bob Wills
  Folk Politics - Woody Guthrie, Jean Ritchie, Hazel Dickens
  Honky Tonk - Hank Williams, Lefty Frizzell