The Show Must Be Go by Kevin MacLeod
Sort of inspired by the 1930s, and sort of inspired by all-out weird. Definitely recommend taking a listen to this piece. Make sure you get to the 1 minute mark... fun times trumpet playing await! I personally enjoy how the clarinet play tries to follow the trumpet player - doesn't work out so well. You can download this in uncompressed format here. Download comes with individual tracks so you can make your own mixes.