I'm using this video as my channel trailer because It's a good example of the the sort of videos I make! 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 Here's the Chladni Figures video: https://www.youtube.com/watch?v=CR_XL192wXw Follow me on twitter here: http://twitter.com/moulds Buy nerdy maths things here: http://mathsgear.co.uk/