own = e => {
        if (e.ctrlKey && e.keyCode === 13) {
          e.preventDefault();
          togglePlayback();
        }
      };
      // Auto-song to URI
      (song.oninput = bpm.oninput = () => {
        location.hash = btoa(
          JSON.stringify({bpm: bpm.value, song: song.innerText}),
        );
      })();
      // Play song or stop the playback
      function togglePlayback() {
        if (C) {
          stop();
          btn.innerText = 'Play';
        } else {
          btn.innerText = 'S