John Cage's composition "4'33"" famously includes not a second of sound — at least, not from any of its performers. The piece is meant to draw attention to the sounds happening all around you, and a new app from the John Cage Trust will let you experience the rich ambient noises being made across the globe. Released for iOS earlier this month, the 4'33" app allows you to explore a map and listen to the composition as it's been recorded by users worldwide. There are already dozens of performances uploaded, with most spread throughout the US, Europe, and Japan. You can record and share your own composition too if you want to give the world an impression of what a short few minutes sound like from where you're sitting.