Adriaan Fokker
Adriaan Daniël Fokker (Dutch: [ˈaːdrijaːn ˈdaːnijɛl ˈfɔkər]; 17 August 1887 – 24 September 1972) was a Dutch physicist and musicologist who worked in the fields of special relativity and statistical mechanics. He is the inventor of the Fokker organ, a 31-tone equal-tempered (31-TET) organ.