Thinking Machine by Martin Riches & Masahiro Miwa

The Thinking Machine by Martin Riches and Masahiro Miwa uses rolling balls and mechanical track switchers to play a programmed sequence of notes on pipes. It has to be one of the most beautifully haunting computers I've ever heard.

From the video description:

The "Thinking Machine" is a ternary computer that outputs melodies formed by three sounds as resulting from the calculations. Whether binary or ternary, it is a computer in the terms of a Turing machine. In Thinking Machine the algorithm is fixed as a mechanical mechanism so it is not a versatile Turing machine or von Neumann type computer. However, like all computers Thinking Machine is a logical machine that can process code, and is an actual object that expresses discrete time within real time.

You can learn more about this and other machines at http://martinriches.de.

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