A-Frame Course - Source of /examples/1300-sound-03-closer.html

<!DOCTYPE html>
<html>
  <head>
    <title>Sound - 03 - Closer</title>
    <script src="https://aframe.io/releases/1.0.4/aframe.min.js"></script>
    <script src="../js/livecode.js"></script>
  </head>
  <body>
    <a-scene background="color:lightblue">
      <a-assets>
        <audio
          id="sonar"
          src="https://cdn.glitch.com/80978ab7-9db6-45ae-bc43-4fab16bdbb6e%2F105338__sandyrb__sonar-ping-pong-a1.mp3?1524837452409"
        ></audio>
      </a-assets>

      <a-box position="0 1.6 -1" color="#ff0000">
        <a-sound
          autoplay="true"
          loop="true"
          volume="1"
          sound="maxDistance:20;rolloffFactor:10"
          src="#sonar"
        ></a-sound>
      </a-box>

      <a-camera>
        <a-cursor></a-cursor>
      </a-camera>
    </a-scene>
  </body>
</html>