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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@jugglingcats
I'll give it a go. I don't know how they do the 'trill' type sound when two notes are to be played together. I assume they alternate between the two notes very fast and setInterval may not be fast enough. Maybe this isn't how it's done but it doesn't sound like a proper chord. My music knowledge very limited!