Klaas Jan Mulder has been played on NTS shows including Open Hand Real Flames , with Passacaglia, Koraal En Fuga Over: Wie Maar Den Goeden God Laat Zorgen first played on 20 January 2021.

Klaas Jan Mulder (May 21, 1930 in Boven-Hardinxveld – November 1, 2008 in Kampen) was a Dutch organist, pianist and conductor.

Mulder was a son of Pastor J.O. Mulder in Hattem. He was introduced to music by his father at an early age and received his first lessons at the music school in Zwolle. The support of a patron later enabled him to attend the Amsterdam Conservatory, where he studied piano with…