Try this by adding a object-fit css property
<html>
<head>
<meta name="viewport" content="width=device-width, height=device-height, initial-scale=1.0, minimum-scale=1.0">
<style>
body {
display: block;
margin: 8px;
}
audio{
max-height: 100%;
max-width: 100%;
margin: auto;
object-fit: contain;
}
</style>
</head>
<body>
<audio controls="" autoplay="" name="media">
<source src="path/to/music.mp3" type="audio/mpeg">
</audio>
</body>
</html>