If there’s one dream for musicians who enjoy the classic rock genre, actually playing in your favorite all-time band and contributing the quintessential sounds to their most popular songs probably ranks as number one.

For German-born keyboardist Martin Gerschwitz, that dream took 37 years, as he told me the story of hearing Iron Butterfly’s “In A Gadda Da Vida” at a party in 1968, and then touring with remaining bandmembers in 2005.