He composes film and TV soundtrack music and, as the staff producer for the Australian division of CBS Records, influenced the Australian popular music scene in the mid-1960s.
He is a Norwegian-Australian composer, record producer and musician.
He has taught piano at Shore School, acts as composer-in-residence at Port Hacking High School and frequently lectures at the Australian Film, Television and Radio School in Sydney.
Libaek first came to Australia in 1960 as a member of the band the Windjammers, which toured the United States and Australia. Shortly after the group broke up, Libaek and his wife returned to Australia to live.
He worked with Maurice Jarre as musical co-ordinator and orchestrator for the Peter Weir film The Year of Living Dangerously and also hosted his own TV show on ABC-TV, All About Music, in 1974.