This is an example of the audio player. Note that you need the font-awesome css and the JQuery files as well as the small Javascript file.
In the JavaScript file clip.js the images for the buttons are defined by:
var playingString = "<i class='fa fa-pause' aria-hidden='true'></i>";
var pausedString = "<i class='fa fa-play' aria-hidden='true'></i>";
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Minimum Requirements for XootBox JokeBox</title>
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" text="text/css" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js" type="text/javascript"></script>
<script src="js/clip.js" type="text/javascript"></script>
</head>
<body>
<audio id="myAudio"></audio>
<div class="mp3Player" data-src="http://www.withinweb.com/demographics/mp3clips/mp3_01.mp3" data-pos="0">
<button class="btnPlayPause button"></button>
<span class="infoLabel">Open Bottle Audio Clip</span>
</div>
</body>
</html>