Tuba Quartet Euphonium,Tuba - Level 3 - Digital Download SKU: A0.1366466 Composed by Les Applegate. Arranged by Tim Olt. Barbershop,Pop,Standards,Traditional. 7 pages. Olt Music #950799. Published by Olt Music (A0.1366466). When people think of barbershop quartet this is often the tune they hear in their head.  This classic adapts beautifully for tuba quartet.