To create an Audio object, I simply do this:

let myAudio = new Audio("myAudio.ogg")

But what if I have multiple sources? In HTML I can do this:

<audio id="myAudio">
    <source src="myAudio.ogg" type="audio/ogg" />
    <source src="myAudio.mp3" type="audio/mpeg" />
</audio>
<script>
    let myAudio = document.getElementById("myAudio")
</script>

But I don't want to use an HTML block. Is there a way to simulate multi-source Audio with only JS?