Teresa Cobarrubia Yoder's arrangement of Trumpet Voluntaire is a favored standard for weddings. The interplay between the two Bb trumpets is especially effective for joyous occasions. Also known as The Prince of Denmark's March. Key: Bb (concert pitch), C (Bb trumpets). Meter: Simple Duple (2/2). Rhythms: Whole, half, quarter, eighth, sixteenth and some dotted rhythms.