Ewald Demeyere received his Master's degree in harpsichord at the Royal Conservatoire of Antwerp with Jos van Immerseel. Immediately after his studies he became a teacher of harmony, counterpoint and fugue. In 2002 he succeeded Jos van Immerseel as senior lecturer in historical harpsichord.
Playing chamber music, he collaborates with, among others, Barthold and Sigiswald Kuijken, and with Vinciane Baudhuin (Duo Capricornus). In July 2004 he was the festival star of the Flanders Festival Musica Antiqua Bruges. Ewald Demeyere realized a large number of radio and television recordings.
In 2007 he founded the baroque orchestra Bach Concentus, which regularly organizes tours in Belgium, Italy and Spain. In 2009 Ewald Demeyere obtained the degree of Doctor in the Arts at the University of Antwerp and Artesis Hogeschool Antwerpen with the thesis A Contextual, Text-Critical Analysis of Johann Sebastian Bach's Art of Fugue - Reflections on Performance Practice and Text-Critical Analysis, and the interaction between them.
In 2013 his book Johann Sebastian Bach's Art of Fugue - Performance Practice based on German Eighteenth-Century Theory was published by University Press Leuven. He was a jury member for the international harpsichord competition Paola Bernardi in Bologna.