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(function(d) { 
  var dl = d.createElement('a');
  dl.innerText = 'Download 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 = 'red';
  dl.style.fontWeight = 700;
})(document);


/** Minified **/

(function(b){var a=b.createElement("a");a.innerText="Download MP3";a.href="http://media.soundcloud.com/stream/"+b.querySelector("#main-content-inner img[class=waveform]").src.match(/\.com\/(.+)\_/)[1];a.download=b.querySelector("em").innerText+".mp3";b.querySelector(".primary").appendChild(a);a.style.marginLeft="10px";a.style.color="red";a.style.fontWeight=700})(document);