I have an html <object>
in my site. I would like to mute content.
I have tried numerous variations of code
<object data="test.mp3">
<embed volume="0"/>
</object>
There is no standard API for interacting for media loaded into objects, so you can't.
If you were to use the <audio>
element then you could set:
document.querySelector("audio").volume = 0;
… with JavaScript.