Instrumental Duet Euphonium,Instrumental Duet,Tuba - Level 3 - Digital Download SKU: A0.815940 By 24Kgoldn Feat. Iann Dior. By Blake Slatkin, Golden Landis Von Jones, Keegan Bach, Michael Olmo, and Omer Fedi. Arranged by Nicolás Cortés Castillo. Pop. Score and parts. 11 pages. Nicolas Ernesto Cortes Castillo #6362047. Published by Nicolas Ernesto Cortes Castillo (A0.815940). Mood by 24Kgoldn Feat. Iann Dior . Arranged for tuba quartet. In B-flat major.