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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
I can't remember about the exact 16 bit encoding, but I'd strongly recommend just using 8 bits - it's not like you'll get anything over 8 bits worth of quality using PWM as a DAC :)
For 8 bits I seem to recall I had to export from Audacity as 'unsigned' or something like that. Basically you want a value from 0..255, not -128..127. You could always just add 128 to the numbers in Espruino when you load the buffer, but if you can it's worth getting the data right at the start.