
The composer of the soundtrack, Vince Guaraldi, died unexpectedly of a heart attack in 1976. "He was found in a room at the Red Cottage Inn hotel, relaxing between sets at Butterfield's nightclub in Menlo Park, California. Guaraldi had just finished recording the soundtrack for It's Arbor Day, Charlie Brown earlier that afternoon."
He wasn't around to discover that his music had become modern Christmas classics. A remastered edition of the soundtrack, which has never been out of print, has been released this year.