Interrupted Serenade (Tuba/Euph Quartet) PDF, by C. Debussy, arr. Forbes
Not many folks know the piano prelude in-between "Girl with the Flaxen Hair" and "Engulfed Cathedral," but its a quick, almost scherzo like romp that actually works well for brass...but only in the most skilled hands. Check out a recording of the original and consider if this piece would work well for you and your quartet. Hard copies available via email request.