Module to convert WebM blob to MP3 blob
The module uses https://github.com/higuma/mp3-lame-encoder-js
W3Module.getWebmBlob('URL WEBM').then( (webmBlob) => { /* YOUR CODE */ } );
// OR GET webmBlob on your way : from XMLHttpRequest / stream / etc ...
...
W3Module.convertWebmToMP3(webmBlob).then( (mp3Blob) => { /* YOUR CODE */ } );
<script src="W3Module.js"></script>
<script src="schema-ebml.js"></script>
<script src="lib-ebml.js"></script>