 He performed with the band a-ha on their tours between 1991–1994, and also recorded a jazz cover of their song "October".He had just finished his last record "This Place" before the tsunami disaster, due to be released in January 2005 along with a release concert planned January 17.Because of the tragic events the release of his record was delayed but the concert became a tribute concert to Køhn's music, where many of his friends participated.