Sousa wrote much more than marches. This work is from a suite entitled Camera Studies - Music for an Imaginary Film. It is clearly Sousa but not the Sousa of the famous marches. A fascinating

Bruce Broughton's Concerto for Tuba was originally written as a Tuba Sonata (M158791). The wind ensemble (A671202) and orchestra (A899602) concerti arrangements are available separately