Baudouin Oosterlynck (Kortrijk, 1946) has been developing a singular artistic practice around sound, silence, and listening since the 70s. For the very first edition of Tectonics in Brussels, he brings together a selection of his remarkable listening instruments in Studio 3. These are not conventional sound-producing instruments, but objects that shift the way we hear. They emerge from intriguing questions: what would the world sound like with differently shaped ears? How can the hidden sonic qualities of an object be revealed in silence? And how do form, space, and air influence our perception? Instruments such as Prothesen, Étant-donnés, Ad Libitum, and Étui-donnés invite you to listen differently — more attentively, more slowly, and with an open ear for the unexpected. Flagey, Brussels Philharmonic free