 It has been called the "king of band instruments", or the "cello of the band", because of its similarity in timbre and ensemble role to the stringed instrument.Euphoniums are widely used in many marches (such as those by John Philip Sousa), and in brass band music of the British tradition.Other ensembles including euphonium are the tuba-euphonium quartet or larger tuba-euphonium ensemble; the brass quintet, where it can supply the tenor voice, though the trombone is much more common in this role; and other mixed brass ensemble.