Kirsten, 69, is survived by his partner Hansi Bailer and a son, Benjamin.
A renowned jazz singer in the sixties, Kirsten set up his own publishing company in 1966 taking Horst Jankowski - of the Horst Jankowski Choir - as his first client. An assiduous netorker, Kirsten toured the US and almost immediately picked up Paul Simon's publishing interests. Later Global lived up to its name going on to represent myriad top flight international stars including Joni Mitchell, John Denver, The Commodores, The Doors, George Harrison and The Police.
Later he created Global Records to allow him to develop and produce his own artists and he built the Arco Studios for acts such as Elton John and Marvin Gaye to use. The record label enjoyed success with acts including Donna Summer and Wishful Thinking.
In 1978 Kirsten teamed up with Peter Knight to establish Global Music, which the pair built into an publishing powerhouse. Knight says, "Peter was the most creative person I ever encountered, both in a musical way and especially in a business sense. He was a tough businessman, but was always charming and disarming which was probably what made him so loved throughout the music industry. He also possessed a great sense of humour and will be greatly missed by his friends".
In 1999 Global was sold to Chrysalis Group creating the Global Chrysalis company in the UK and Germany.