Sound-on-disc is a category of sound film techniques that use a phonograph or disc-based system for synchronising sound with a motion picture.

Sound-on-disc is an audio technology that was initially conceived during the early 20th century, achieving commercial feasibility in the late 1920s. This system involved the recording of music and dialogue onto wax records, which were subsequently played in synchronisation with the film using a turntable. This turntable was intricately linked to a film projector through a carefully coordinated mechanism, ensuring that sound and visuals harmoniously converged for a complete cinematic experience.

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Parra's studio, with Parra at the centre, his back to the camera as he works on the large painting takes centre stage, showing a faceless blue woman in a striped dress, painted in red, purple, blue and teal. The studio is full of brightly coloured paints, with a large window on the right and a patterned rug across the floor under the painting.