The Kromophone is a color sonification device. This means it turns colors into sounds. It's a sensory substitution device, which means it turns sensory perceptions from one modality (i.e., color vision) into sensations in another (in this case, auditory perceptions).
The Kromophone was developed for its users to be able to get around and make sense of their environment purely by auditory sensation. A secondary (but important) goal was to allow users a pleasing experience of visual artwork while blindfolded.
The Kromophone will take visual input from the camera and produce sound output. Development is underway for more mobile versions running on Android, Raspberry Pi, and even some custom hardware.
The Kromophone takes the intensities of five different colors that you see (red, green, blue, yellow, and white) and maps them to the volume of five different sounds (high pitched trumpet, medium pitched violin, low pitched tuba, medium-high pitched organ, medium pitched tone). As the intensities of the colors in front of the camera change, the volume of these different colors change.