The music on this recording was created using photographs of 20 Polyphon discs....
The photographs were imported into i2sm which converts digital image files into music. It analyses the brightness, colour and saturation of pixels in the image and converts them into MIDI. The MIDI generated was then further adapted. Instrumentation, samples and incidental events were added and transformed for aesthetic and musical continuity.
A Polyphon is a disc-playing music box, a mechanical device first manufactured by the Polyphon Musikwerke. Invented in 1870, full-scale production started around 1897 and continued into the early 1900s. More about the Polyphon can be read here - https://en.wikipedia.org/wiki/Polyphon