The « pendule sonore » is both a musical instrument and an ecological sound apparatus.
It exploits the natural affordances of the gravitational field to produce sounds from objects that swing freely over a percussive element. Spectromorphologies can either be controlled by means of performative gestures, or emerge autonomously from the perpetual back and forth movement of objects.
Collected objects can be added to, or removed from the scrap wood-built pendule’s frame so as to intervene in the definition of its global timbre. A small motor made from an old computer’s fan is responsible for communicating an angular momentum to a piece of twine, which in turn collides with hung objects to make them radiate sound. The apparatus was used in the composition and performance of grapher.