STEINWAY & SONS Factory, Hamburg, Germany. Swedish pianist Jacob Karlzon is joined by Danish bassist Morten Ramsbøl and Swedish drummer Rasmus Kihlberg at the Steinway piano factory in Hamburg to present their album âOpen Watersâ. Karlzon, a classically trained pianist who shared a stage with Kenny Wheeler, Norma Winstone, and Billy Cobham keeps the rich tradition of Swedish jazz eclecticism alive. Back in 2012, Karlzon explored the world of heavy metal, after that allowing electronic elements to set the pulse.