Oh, that's awesome!
Is this the one? Or am I getting ahead of myself? 😛
edit: I did get ahead of myself - found it https://github.com/espruino/EspruinoDocs/blob/master/modules/USBMedia.js
@Stoaty started
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.
Oh, that's awesome!
edit: I did get ahead of myself - found it https://github.com/espruino/EspruinoDocs/blob/master/modules/USBMedia.js