Hi makenzi.exc,
For reseting an audio pause function will be used and currentTime is set to 0.
Refer below example.
HTML
<html>
<head>
<meta charset="utf-8" />
<title></title>
<style type="text/css">
body { font-family: Arial; font-size: 10pt; padding-left: 20px; }
</style>
</head>
<body>
<audio controls>
<source src="https://www.aspsnippets.com/audio/welcome.mp3" type="audio/mpeg">
</audio>
<br /><br />
<input type="button" name="play" value="Play" onclick="Play()" />
<input type="button" name="pause" value="Pause" onclick="Pause()" />
<input type="button" name="stop" value="Stop" onclick="Stop()" />
<script type="text/javascript">
var audio_player = document.querySelector("audio");
function Play() {
audio_player.play();
};
function Pause() {
audio_player.pause();
};
function Stop() {
audio_player.pause();
audio_player.currentTime = 0;
};
</script>
</body>
</html>
Demo
Screenshot

Downloads
Download Sample