The Diabelli Project is about offering my weekly flash-composition sketches freely to all. Like Antonio Diabelli's theme, these sketches aren't great music. But perhaps (as in Diabelli's case) there's a Beethoven out there who can do great things with them.
To me, a small chamber composition -- such as a trio, quartet, or quintet, should really be a conversation among equals. That's no to say everyone has the melody all the time, but there should be an equitable division of labor. The first violin shouldn't get all the juicy parts in a string quartet -- nor the first trumpet in a brass quintet.
When I started this sketch, I decided to give the tuba its due, as well as the trombone and let the other instruments support the low-register brass for a change.
As always, you can use any or all of the posted Diabelli Project sketches as you wish for free. Just be sure to share the results. I'm always curious to see what direction someone else can take this material.