The tapping technique began to be taken up by rock and blues guitarists in the late 1960s. One of the earliest such players was Canned Heat guitarist Harvey Mandel, whom Ritchie Blackmore claims to have seen using tapping onstage as early as 1968 at the Whisky a Go Go. George Lynch has corroborated this, mentioning that both he and Eddie Van Halen saw Mandel employ "a neo-classic tapping thing" at the Starwood in West Hollywood during the 1970s. Mandel would use extensive two-handed tapping techniques on his 1973 album "Shangrenade." Another early example of the tapping technique can be heard in Terry Kath's "Free Form Guitar" from Chicago's debut album in 1969.