The Ricercare No. 13 and Fantasia No. 1 for four euphoniums (or three euphoniums and tuba) arranged by Ralph Sauer are two wonderfully composed contrapuntal works that are a joy to perform. They are possibly the best works from a collection of his numerous keyboard compositions.
All parts are in bass clef, are appropriate for advanced performers and can also be performed with 3 euphoniums and 1 tuba. the publisher