Get 'muted' status

I need to get status of TV whether it’s muted or not.
I found a not documented method for this: luna://com.webos.audio/status.
It works fine on several different TVs: WebOS 2.0, WebOS 4.9. But on TV with WebOS 6.3.3 this method always returns muted: false independently of it’s real status.
Does somebody knows what else can I use to get status ‘Muted’?

You can use the muted property of the media tag from webOS TV 4.0. Thank you.

@narae0.kim Could you please be more descriptive? What is ‘media tag’? Where can I find it?

I meant the video/audio tag in HTML. Thank you.

@narae0.kim Thank you.
I tried ‘muted’ atribute from video/audio tag in HTML. It always returns ‘false’ regardless of the ‘muted’ status of the TV.