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Here are instructions for building a drum machine with a tangible visual interface. A camera above the paper drum board reads the positions of physical objects and translates them into sounds, as indicated on the labels on the objects. It looks fairly easy to make, with most of the components from paper and card.

The d-touch Drum Machine

Gareth Branwyn

Gareth Branwyn is a freelancer writer and the former Editorial Director of Maker Media. He is the author or editor of a dozen books on technology, DIY, and geek culture, including the first book about the web (Mosaic Quick Tour) and the Absolute Beginner’s Guide to Building Robots. He is currently working on a best-of collection of his writing, called Borg Like Me.

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