Sound-Hole was developed upon the Jpg2Wav commandline application.

You can load either 1 or 2 jpeg files to create a mono wav (from 1 jpeg file) or stereo wav (from 2 jpeg files) as output, this wave-file containing the specified images as their audio spectrum.

Sound-Hole can be used as a way of making interesting sounds, by drawing an image (it is best to draw in white or shades of gray on a black background, but any jpeg will do), and then running it through Sound-Hole.