code: function createWaveformsExample() {
          const el = document.querySelector('[data-waveforms]');
          sound.once('ready', function() {
              ui.createWaveform({
                  el: el,
                  sound: sound
              });
              ui.createVisualizer({
                  el: el,
                  sound: sound
              });
          });
      }
docs: /*
  waveforms