Excuse me for posting again, but I meant to say this to Lighter: The musicological connection of "Dixie" to Af Am tunes is well documented in the literature, covered in both Hans Nathan (1962) and Constance Rourke (1931). Rourke, an Af Am music scholar, wrote: "Emmett's walkarounds--'Dixie' was a walkaround--are particularly significant a suggesting Negro origins." Nathan has a lot to say about musicology questions.