Laser + mirror + sound
by Super User, 3 weeks ago.
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Thanks to Brian Mackenwells for showing me this (@mackenwells). A laser shining on a mirror driven by a speaker creates cool patterns.
Here's the code for making sounds in your browser with keyboard shortcuts: https://gist.github.com/steventhebrave/7c16a72fb940b05b5e5218390418b5bf
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