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, ...