Sound is the ape of light," wrote the Jesuit father Athanasius Kircher. Are the laws of optics transposable to the world of sound? Can we see sound? Around the relations between the visual and the sound, the voice and its representations, this film exposes and confronts a series of actions, freely inspired by the lessons of things or treatises on acoustics: singing, shorthand, listening, speaking, stuttering, imitating the language of birds, making noise, playing various instruments (cymbalum, harpsichord, flute, viola, glass harp).
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