Music has long been part of esteemed equestrian traditions—consider the classical tones of the over-500-year-old Spanish Riding School and the Verdi purported to play at deafening volumes from the arena of Portuguese master Nuno Oliveira. Today we have sound systems that enable the most humdrum of riding lessons to become rhythmical dance rehearsals. And on the Olympic stage, the very best in international talent compete to discover which exquisitely choreographed performance is gold-medal-worthy. The musical “freestyle,” as it's known, has become a form of equestrian display that draws large audiences in horse sports of every kind: dressage, Western dressage, and Cowboy Dressage; reining and liberty; breed classes and training competitions; drill teams and quadrilles.