Umbráfono is a project by Enrique del Castillo (Jaén, 1982) that consists of a performance with an optical reader capable of transforming light stimuli that are projected onto a photosensitive cell into sound. These luminous stimuli are generated by a beam of light passing through celluloid films which are designed from a scheme of relationship between wave frequency of the notes and repetition of geometric shapes, so that harmonic sounds can be achieved., noises, sound textures and atmospheres.
This project is based on the optical-analog reading system used in the cinema since 1919 to interpret the soundtracks that are part of the films.
The read heads have been modified to read multiple voices simultaneously and to function as independent instruments. The pieces that make them up have been damaged and manufactured by the author, as well as the films used, which are original compositions without a copy.