From the YouTube website:
What happens when a horror movie composer and a guitar maker join forces? They create the world’s most disturbing musical instrument. Affectionately known as "The Apprehension Engine," this one-of-a-kind instrument was commissioned by movie composer Mark Korven. Korven wanted to create spooky noises in a more acoustic and original way—but the right instrument didn't exist. So his friend, guitar maker Tony Duggan-Smith, went deep into his workshop and assembled what has to be the spookiest instrument on Earth.
Check it out:
Did a little DuckDuckGo'ing and it turns out that you can buy one of these: The Apprehension Engine
Mark's website is here: Mark Korven - lots more video of The Apprehension Engine there.
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