Get ready to feel very emotional with "Billy the Kid Suite: I. Introduction: The Open Prairie" by Aaron Copland. With a 131 BPM and 3 time signature, the rhythms flow in A♯/B♭ major. Spanning 9 minutes and 47 seconds, "Billy the Kid Suite: I. Introduction: The Open Prairie" radiates low energy from start to finish. Let the very emotional vibes of this track carry you away.