Music Arrangements for New Horizons Band - dolanmc "Exodus". An arrangement of the main title theme of the 1960 film by the same name. The original score for the film won an Oscar. Parts. "Happy Birthday". An arrangement of Happy Birthday for Concert Band. Nothing fancy, just the tune - but with a short introducdtion that can be used optionally. Happy Birthday Band Sheet Music - musicallthetime The string arrangement of Happy Birthday is in the key of D, so if you want to combine woodwind, brass, and string instruments, select your desired key on that page. To determine the correct key for your instrument, visit the transposition chart page.