Euphonium,Piano - Level 3 - Digital Download SKU: A0.1425681 By John May. By Angel Villoldo. Arranged by John May. Chamber,Contest,Festival,Latin,Multicultural,World. Score and part. 7 pages. Lost Key Music #1006445. Published by Lost Key Music (A0.1425681). El Choclo (The Corn Cob) is one of the most popular tangos in Argentina. It is arranged here for euphonium/bass clef baritone solo with optional piano accompaniment. Includes separate euphonium part.