Jerry Gray (1915-1976) was an arranger and composer who shaped the sound of the swing era, most famously as a staff arranger for the Glenn Miller Orchestra. His gift for crafting clean, danceable arrangements made him one of the most recorded arrangers of the 1940s, and his work remains a touchstone for understanding big band orchestration and the popular music of that decade.
Gray composed "Pennsylvania 6-5000" in 1940 as a novelty number built around the phone exchange of the Hotel Pennsylvania in New York City. The song became one of the Glenn Miller Orchestra's signature hits, demonstrating Gray's skill at writing melodies that stick in the ear while maintaining harmonic sophistication underneath.