Sun Boxes is an art project courtesy of Craig Colorusso. Each box in the array has a solar panel, a speaker and a chip inside with an embedded sound (a guitar tone of different length). The triggered sounds create a peaceful gradient of tones that mixes well with the ambient sounds of wherever they are installed. From this interview :

Each powered by solar panels, Sun Boxes’ twenty speakers contain PC boards with recorded guitar notes loaded and programmed to play continuously in a loop. Collectively, these guitar notes create a Bb chord. Because the loops are different in length, once the piece begins they continually overlap and the piece slowly evolves over time.

The results are oddly alluring. Please partake.

via Paige.