<audio controls class="radio" id="radio" onended="radio()">
<source src="" type="audio/mpeg">
</audio>
<input id="range" min="0" max="100" value="100" type="range">
var audio = document.getElementById('radio');
var rng=document.getElementById('range');
audio.volume=rng.value;
audio.volume=rng.value / 100;
<input id="range" min="0" max="1" step="0.01" value="1" type="range">