Alpert's only No. 1 single during this period, and the first No. 1 hit for his A&M label, was a solo effort: "This Guy's in Love with You" (written by Burt Bacharach and Hal David), featuring a rare vocal. Alpert sang it to his first wife in a 1968 CBS Television special titled "Beat of the Brass". The sequence was filmed on the beach in Malibu. The song was not intended to be released, but after it was used in the television special, allegedly thousands of telephone calls to CBS asking about it convinced Alpert to release it as a single, two days after the show aired. Although Alpert's vocal skills and range were limited, the song's technical demands suited him." ...By usual standards, I don't have a great instrument as a vocalist. But maybe there is a basic truth that comes across..."</ref>