J.S. Bach - Well-Tempered Clavier: Part 2 - Fugue 21 (Euphonium-Tuba Quartet)
J.S. Bach - Well-Tempered Clavier: Part 2 - Fugue 21 (Euphonium-Tuba Quartet)

This is an arrangement by Richard Byrnes for 2 Euphoniums & 2 Tubas.