His best-known work is interpretations of the music from Spaghetti Westerns, especially his cover version of Ennio Morricone's main theme from the 1966 film The Good, the Bad and the Ugly.

[2] In the middle 1950s, he was directing, conducting, and arranging the orchestra for Eliot Glen and Irving Spice on their Dragon and Caprice labels.

Following the success of his albums, he was contracted by Columbia Pictures where he scored such films as Hurry Sundown (1967),[2] Lady in Cement (1968), The Undefeated (1969), Viva Max!

The music rights in order to release a DVD sale could not be obtained as the estate could not be found, the score is considered "lost".

During the mid‑1960s he started producing some of the most renowned works from the space age pop era, featuring electronics and rock in albums such as Moog Power and Mammy Blue.

[citation needed] He will be also remembered by his versions of classics such as the main theme to Sergio Leone's film The Good, the Bad, and the Ugly, originally composed by Ennio Morricone.