Maybe, you had watched this beautiful and very realistic computer animation where the virtual graphics instruments made of pipes, strings and balls were playing digital music. It was very popular some years ago and even many people had believed that Incredible Music Machine was real. Watch this one first before the real action:
Now, such a machine became a reality by the efforts of Absolut Visionaries. The whole instrument system consists of rubber balls, wooden keys, tuned wine glasses, robotic fingers. The most interesting part of the story is that you can interact with the Absolut Quartet machine at absolutmachines.com website online. You can enter your theme for some seconds, and the clever sound machine will perform it like an musical ensemble. Yeah, another creative reason for us to drink that flamefull Vodka! 
Here is the video:
There are 2 more sound machines I have found unique. If you are further interested in, visit also Pe lang + zimoun machine and Festo sound machine.
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