Leslie Gock was born in 1954. He was a member of a school-based band in 1970, he remembered their first gig, "an audience of a thousand kids." In 1971 he began as a music and sound designer for film and TV. Hush were formed in Sydney in 1971 as a five piece light pop group by Robin Jackson on guitar, John Koutts on drums, Keith Lamb on lead vocals, Rick Lum on bass guitar and Chris Nolan on keyboards. Gock was in a group, Chariot, and saw Hush performing "I wanted to check our competition... were very professional, but not ballsey enough." In April of the following year Gock joined Hush on lead guitar together with Chris "Smiley" Pailthorpe on drums to form a four-piece glam rock line-up with Lamb and Lum.