Some people describe creative coding as 'Computer Magick' and I agree, there is some degree of mysticism involved. Taking a physical phenomena and distorting it so that is no longer real is what Imaginary Resonances is about.
There is a surface and sand is dropped on it. The surface vibrates and ushers the sand into patterns. What kind of sound could have made the surface vibrate like that?
The algorithm behind Imaginary Resonances is simple variation on Chladni figures: figures that arise when sand is dropped on a vibrating surface.