Use audio in repository

So i have a js for my site to play music, my question is how do i play a music file that exists in my repository?

var audio= new Audio(“Needles and Pins.mp3”);

function PlaySong() {

if (audio.paused) {

audio.play();

alert("You found it! ^_^\nNow playing: Needles and Pins")

}

else {

audio.pause();

}

};