Melodioues Etudes 41-50 The Bordogni vocalises have been used by generations of low brass performers to learn legato technique, phrasing, endurance, bel canto style, expression, and breath control. They sound beautiful and are fun to play! Ran Whitley has beautifully arranged another ten of the Melodious Etudes, numbers 41-50 for Trombone Quartet. All in bass clef, these are appropriate for intermediate to advanced performers. The entire melody line is in part 1 with parts 2, 3, and 4 accompanying.