Custom Mute/Unmute Control button

Hi There,

I found in many post that below jawaScript code is used for mute/unmute trigeer panel, 

var appState = require("helpers/appState");
appState.onToggleVolume();//mute

 

But, in my case, I am unable to get this functionality working for modern player. I wat to control audio by using mute/unmute button functionality. 

I added triggered in Master slide and per slide level as well, Not getting mute/unmute functionality. 

Thanks

Chandra