const video = document.getElementById('audio');

​

const mediaSource = new MediaSource();

​

video.src = window.URL.createObjectURL(mediaSource);

​

mediaSource.addEventListener('sourceopen', async () => {

​

  const sourceBuffer = mediaSource.addSourceBuffer('audio/webm; codecs="opus"');

​

  const response = await fetch(audioSRC);

​

  const body = response.body

​

  const reader = body.getReader()

​

  let streamNotDone = true;

​

  while (streamNotDone) {

​

    const {value, done} = await reader.read();

    if (done) {streamNotDone = false; break;}

    await new Promise((resolve, reject) => {

      sourceBuffer.appendBuffer(value)

​

      sourceBuffer.onupdateend = (() => {

        resolve(true);

      })

    }) 

​

  }

});