In the movie "The Cotton Club" from 1984, the character of Dixie Dwyer (Richard Gere) plays the solo part of Bix's "Singin' The Blues". The mobster Dutch Schultz gives Dixie the order to play "that Bix Beiderbecke, tune, the one I like" and Dixie plays the solo.
According to Wikipedia, the character of Dixie Dwyer is loosely based on Bix Beiderbecke, right down to the alliterative name, and everyone simply calling him "Dix." I would say very loosely based on Bix although I love this movie very much.
According to imdb.com, Richard Gere plays the cornet solos himself and in my opinion, he's doing it pretty well!
Also in the movie, he gets the occasion to play as a white musician in Cotton Club.
I think that the movie "The Cotton Club" is a very good movie about the Roaring Twenties with exceptional good and genuinely played music. Besides that, Diane Lane never looked better than in this movie.