Born in Louvain, he won first prize in a local music competition at the age of 11 and subsequently enrolled at the Brussels Conservatoire.
His main teacher there was Louis Brassin, a former pupil of Ignaz Moscheles, although he also took lessons from other staffers at the institution, including Joseph Dupont, François-Auguste Gevaert and Fernand Kufferath.
[1] After graduating with high distinction from the Conservatoire at the age of 17, De Greef went to Weimar to complete his studies under Franz Liszt.
British critic Jonathan Woolf has written: "De Greef was, in all respects, an intensely musical, non-sensationalist, eloquent and impressive musician and whilst not being averse to some of the interventionist tactics of his contemporaries (retouching of the score) remained sympathetically self-effacing".
[5] Other recorded works included: Liszt: Chopin Schubert Moszkowski Saint-Saëns A complete discography can be found at Earthlink here.