John Butler trio, headed by a guy named, you guess it, John Butler, is a jam rock band from Australia. Butler started his career playing guitar on the streets of Fremantle in Western Australia, selling homemade cassette tapes. This period inspired him to write songs such as Ocean, an instrumental piece played on an open-tuned 12 string guitar.

Here’s a live performance of Ocean.

For more about John Butler Trio, check out this interview at VH1.com