William Overton Smith (September 22, 1926 – February 29, 2020) was an American clarinetist and composer. He worked extensively in modern classical music, Third Stream and jazz, and was perhaps best known for having played with pianist Dave Brubeck intermittently from the 1940s to the early 2000s. Smith frequently recorded jazz under the name Bill Smith, but his classical compositions are credited under the name William O. Smith.

Smith was born in Sacramento and grew up in Oakland, California, where he began playing clarinet at the age of ten. He put together a jazz group to play for dances at 13, and at the age of 15 he joined the Oakland Symphony. He idolized Benny Goodman, but after high school, a brief cross-country tour with a dance band ended his romance for the life of a traveling jazz musician. He gave two weeks’ notice when the band reached Washington, D.C. Encouraged by an older band member to get the best education he could, Smith headed to New York.

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