Born on 7 February 1993 in Maisons-Laffitte, France, Simon Kaplan is a French composer. Inventor of diahemitonic modality, a quarter-tonal composition system, he graduated from the Koninklijk Conservatorium Brussel, where he studied composition in the class of Peter Swinnen.
Kaplan's music is internationally performed, notably in France, Belgium and Japan. He regularly delivers lectures upon diahemitonic modality at conservatoires and universities.