Koen Dieltiens studied music education, organ, and recorder at the Lemmens Institute. Encounters with Paul Van Nevel and Jos van Immerseel fired his passion for early music, more specifically for the Renaissance and baroque recorder repertoire. He pursued advanced studies in Antwerp, earning diplomas in music history and harmony. Koen Dieltiens won the international competition for recorder in Saint-Hubert. He often plays with ensembles under the baton of René Jacobs, Sigiswald Kuijken, Philippe Herreweghe, and Paul Dombrecht.