Michael Beinhorn is a stalwart of 90s rock. The producer has worked with the likes of Soundgarden, Marilyn Manson and Red Hot Chili Peppers, the experiences from which still inform his work as a ‘pre-producer’ today. One of the most storied albums he produced was Hole’s Celebrity Skin – but beyond the well-publicised spats behind studio doors, the Grammy-nominated record remains the band’s finest.