He also worked extensively on other productions, including "RAM Pietsch - Norwegian Wood" which featured the Munich Symphony Orchestra, and the vocalists Dan McCafferty, Mary Hopkin, and Maggie Reilly.
Ian Fleming | Ian McKellen | Ian Smith | Ian Rankin | Ian Brown | Ian Botham | Ian Thorpe | Ian McEwan | Ian Paisley | Ian Kershaw | Ian Bremmer | Ian Roberts | Ian Ogilvy | Ian McShane | Ian MacKaye | Ian Holm | Ian Carmichael | Ian Richardson | Ian La Frenais | Ian Gillan | Ian Dury | Ian Bannen | Janis Ian | Ian Roberts (actor) | Ian McNeice | Ian Edginton | Ian Anderson | Ian Pooley | Ian Page | Ian O'Brien |
Köhler co-owned Karo Music Studios and produced music for artists including Kalle Trapp, Blind Guardian, Molly Hatchet, New Commix, Kentucky, Toll House, Ser, Ian Cussick band, BLUE BLIZZ, Wave (with Wiedeke) and Gnadenlos Platt.