LDJ6915

(function(d) { 
  var dl = d.createElement('a');
  dl.innerText = 'Download as MP3';
  dl.href = "http://media.soundcloud.com/stream/"+d.querySelector('#main-content-inner img[class=waveform]').src.match(/\.com\/(.+)\_/)[1];
  dl.download = d.querySelector('em').innerText+".mp3";
  d.querySelector('.primary').appendChild(dl);
  dl.style.marginLeft = '10px';
  dl.style.color = 'tomato';
  dl.style.fontWeight = 500;
})(document);