midi file download

midiconvert.js

var midi = MidiConvert.create()
midi.track()
  .patch(32)
  .note(60, 0, 2)
  .note(63, 1, 2)
  .note(60, 2, 2);

var data = 'data:audio/midi;base64,' + btoa(midi.encode())
var element = document.createElement('a');
element.setAttribute('href', data);
element.setAttribute('download', 'miditest.midi');
element.style.display = 'none';
document.body.appendChild(element);
element.click();
document.body.removeChild(element);