Nice.<p>Here&#x27;s some messages hidden in audio &#x27;noise&#x27; generated from stretching out all the black and white squares of a QRcode and generating some audio from it.<p>It can also be decoded back to the QR code and back to the message.<p>Neat.<p><a href="http:&#x2F;&#x2F;qrdio.com" rel="nofollow">http:&#x2F;&#x2F;qrdio.com</a>