In addition to his carillon duties, the cathedral paid Van Eyck an additional salary to wander the grounds of Utrecht cathedral and entertain the passers-by with songs on his recorder. He (presumably consequently) became a skilled improviser on a theme and three collections of his variations for descant recorder were published: Euterpe and the two parts of Der Fluyten Lust-hof (or "The Flute's Pleasure-Garden"). Der Fluyten Lust-hof contains 144 sets of variations on a variety of melodies popular in Renaissance Holland. One of the best known is the variation on Dowland's Pavane Lacrymae. Although Van Eyck wrote them for amateur musicians, the different sets commonly increase in technical difficulty towards the end. Some of them are very difficult indeed. This is one of the largest Renaissance collections of solo recorder music. It is particularly unusual as the instrument used is the less popular descant recorder rather than the more common alto.