Weston became known as a vocal arranger. His work with Rudy Vallee brought him to national attention. After arranging for Vallee, he attempted to work with Bing Crosby, but the results were unsuccessful. Following the failed Crosby venture, Weston became an arranger for Tommy Dorsey, which is where he made his reputation. While with Dorsey, he wrote jumping, swinging charts for the band and vocalists like Dinah Shore and Jo Stafford, whom he would marry in the mid-'40s.
Weston became the A&R director for Capitol Records in 1944, when the label was just beginning. Though he continued to write fast swing charts for a time, Weston noticed that the tastes of the public were beginning to move toward gentler material, so he adjusted his music accordingly. Weston released his first album of mood music, Music for Dreaming, in 1945. Music for Dreaming was decidedly calmer than his previous work, though there was a subtle swing driving the subdued music. The album was a major success, and Weston continued to record albums of smooth, string-laden music for the next five years. By 1950, the term "mood music" had been adopted by the press to describe this style of instrumental pop.
Weston left Capitol Records in 1950 for Columbia Records, where he continued to record albums of instrumental mood music. He also continued to write arrangements and conduct sessions for artists like Sarah Vaughan, Ella Fitzgerald, Dinah Shore, and Doris Day. By the end of the decade, he had returned to Capitol Records, where he stayed throughout the '60s. In the early '70s, Weston and Stafford both retired. The couple began a reissue label, Corinthian Records, in the early '90s which released CD versions of their music. ~ Stephen Thomas Erlewine, Rovi