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Show HN: Turning Hand Movement into Music

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Post by getToTheChopin » Fri, Aug 15, 2025, 2:43 PM UTC

I'm experimenting with a musical instrument design, using hand rotation to change tempo and note cycles.

Created with javascript, mediapipe computer vision, tonejs, threejs.

This runs in real-time in the browser.

Re: Show HN: Turning Hand Movement into Music

Post by nimzoLarsen » Fri, Aug 15, 2025, 2:58 PM UTC

this is really cool, I like the UI and it sounds a lot better than I was expecting it to

Post by getToTheChopin » Fri, Aug 15, 2025, 3:01 PM UTC

nimzoLarsen wrote: post #2

this is really cool, I like the UI and it sounds a lot better than I was expecting it to

Thank you! I spent a lot of time tuning the synth parameters in tonejs to try to get something I was happy with.

The scales are based on the Japanese "in" pentatonic scale (sometimes called the Sakura scale), which I find really pretty.