Making Buttons with Sound and Adding Background Music

I put all code in my "actions" layer, looks like: 

this.play_btn.addEventListener("click", playF.bind(this));
this.pause_btn.addEventListener("click", pauseF.bind(this));
this.stop_btn.addEventListener("click", stopF.bind(this));

function playF() {
this.play();
}
function pauseF() {
this.stop();
}
function stopF() {
this.gotoAndStop(0);
}

var root = this;
root.playSound = function(linkage, type, stopPrevious, props)
{
if (!props)
props = {};

if (stopPrevious && root[type])
    root[type].stop();

root[type] = createjs.Sound.play(linkage, props);
};

root.on("click", function(e)
{
if (e.target.name === "prev")
    root.gotoAndStop(root.currentFrame - 1);
else if (e.target.name === "next")
    root.gotoAndStop(root.currentFrame + 1);
else if (e.target.name == "pressToStart")
    root.gotoAndStop(1);
});

if (navigator.userAgent,toLowerCase().indexOf('chrome') > -1)
root.stop();
else
root.gotoAndStop(1);

I do this and my sound doesn't play at all anymore. Before it did play but it would overlap itself when I paused it. 

What do i do to fix this? 

also my Adobe Animate CC 2021 Timeline looks like this: