[criley2]

>You should be able to describe the sound differences if the music is that distinct.

They are and I can, however the existence of Black Swing is in no way predicated on a difference in sound only.

Consider this: white culture in America continually stole from a legally repressed black culture, including white swing which stole the black art and commercialized it. Even if a 1950 white swing song sounds similar to a 1940 black swing song, there is still a "black swing" and a "white swing".

Frankly, I think trying to reduce history of music down to "the sounds themselves" is a way to whitewash the history and destroy the true knowledge of what happened and why. The context is very important.