JWT Brazil chief integration officer Mauro Cavalletti and his crew continue their string of quirky projects (remember this?) with this latest app called “91 Rock Clock,” which will wake your ass up–but in progressive fashion–as it veers from soft AM gold to heavier rock tunes (think Metallica and Sepultura). Think of it as a snooze button with distortion. In case you’re not based in South America, 91 Rock Radio is a rock radio staple in SA and…well, let the video above explain things. We’re light sleepers, so we’d probably spring out of bed during an REO Speedwagon track, but if you’re into it, you can go here or here to download the app. Credits after the jump.

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