I saw this on Artist Bloc and thought it was such a cool idea:
Sun Boxes are an environment to enter and exit at will. It’s comprised of twenty speakers operating independently, each powered by the sun via solar panels. There is a different loop set to play a guitar note in each box continuously. These guitar notes collectively make 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 setup looks so odd and peaceful, arranged as it is in unspoiled nature like machinery left behind by a civilization thats long ago passed on. The fact that these are powered by the sun only makes the scenario more plausible. The speakers will continue to wail and moan without human intervention for as long as all its machinery remains functional and the sun continues to shine.