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Volkswagen has developed a way to turn its cars into giant metal DJs. When plugged into a Volkswagen GTI, the German vehicle manufacturers Play The Road iOS app uses a swathe of data from the car — including its velocity, engine revs, and location — to create a soundtrack that changes as its driven. Go even faster, as Volkswagens test driver does in its 17 minute test video on a closed track, and the effects wash out almost entirely, leaving the driver with an ethereal electro soundtrack to their joyride that only kicks back in as he slows down. In addition to data provided by the cars on-board computer, the app uses information from the iPhones gyroscope and accelerometer to modulate the music on the fly, also using the smartphones GPS system to work out where the car has traveled, and when to play specific sounds.