American record producer who began his career in the mid 1960s in the Santa Cruz area as a drummer in a band called The Tikis. The group changed their name to Harpers Bizarre in 1966, with Templeman switching to guitar and vocals. In 1967, the group released the album Feelin’ Groovy (Warner Bros.). Harpers Bizarre disbanded in 1970.
That same year, Templeman recorded what is now considered a cult classic. Using doubletracking, he appeared as “The Templeton Twins” backed by “Teddy Turner & his Bunsen Burners,” recording contemporary hits of the time such as “Hey Jude” and “Light My Fire” in a pseudo-1920s style.
Much of his work was done in collaboration with recording engineer Donn Landee at Sunset Studios in Hollywood, California. In 1970, Templeman began working as an engineer for Warner Bros. Records. That year, he produced the eponymous The Doobie Brothers debut album, followed the next year by the Doobies’ Toulouse Street album, which achieved platinum record status on the strength of the hit single “Listen to the Music.”
In 1973, Templeman produced another classic and eponymous album, Montrose, which was released in November of that year. In 1976, he produced Carly Simon’s sixth studio album, Another Passenger, for which he arranged both the Doobie Brothers and Little Feat to serve as Simon’s backing band. Templeman produced six albums for Van Halen.
Other artists produced by Templeman include Van Morrison, Captain Beefheart, Aerosmith, Eric Clapton and Joan Jett and the Blackhearts.

Link to Wikipedia biography