Waveform music (multiple notes)

See here: http://www.espruino.com/Puck.js+Keyboard

var controls = require("ble_hid_controls");
NRF.setServices(undefined, { hid : controls.report });
setWatch(function() {
  // Play/stop music
  controls.playpause();
}, BTN, {repeat:true,edge:"rising",debounce:50});

Should do it.