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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.
@Gordon
Yes, do
w.stop()to stop playback, andf.close()(I think), and you'll be sorted.As I said above though, it turns out the DAC on A4/A5 does work nicely, it just needs amplifying.