Hidden Factts is a wonderful disc of Flemish music for various woodwind combinations written by the likes of Robert Groslot, Erik Desimpelaere, Piet Swerts, Bram Van Camp and Jan Huylebroeck. Robert Groslot's Hibernaculum (2015) begins almost cinematically. The flute and the clarinet swiftly transport us to an idyllic landscape with their compelling melodic dialogue, in which they are subsequently joined by the oboe, bassoon, and horn. The engraving on copper made in 1590 entitled Canticum Canticorum contains the music of a motet by Andreas Pevernage from Harelbeek; this engraving forms the subject of Les cinq Motets d'Mirage (2010) by Erik Desimpelaere. Unlike the two previous works, Piet Swerts' Interaction (2015) was not inspired by a non-musical concept. It is abstract music that researches the interaction between a wind quintet and a piano by means of the music itself. Bram Van Camp's fascination for audibly distinct layers of sound that develop independently of each other lies at the heart of his Hidden Facts (2004). Although there are dozens of layers concealed within this composition, the use of only five instruments means that they can never all sound at once. A particular layer can remain inaudible for an indefinite period, but will then resurface at other moments; it has never completely disappeared from sight.