I've always loved this music. And I've always wondered who the heck Vince Guaraldi was. I googled him today, and guess what I found out! He was born in San Francisco. He graduated from Lincoln High School and then San Francisco State College.
As well as writing cartoon music for A Charlie Brown Christmas, he was asked by the reverend at San Francisco’s Grace Cathedral to write some dinner jazz. For a ceremony at the cathedral commemorating the Last Supper. It was performed live on May 21, 1965.
Then–on February 6, 1976, while waiting in a motel room between sets at a Menlo Park nightclub, he died of a heart-attack. He was 47 years old.