Help with sound on Animate (Loop and Scene Switching) AS3

Hello how's everyone doing? I'm trying to achieve adding background music to a project. The timeline is pretty empty, it has 1 keyframe for each layer. I need to import this song and to make it repeat on loop infinitely until it loads another scene on the main game that I think is coded on "Visual Studio". All the scenes are individual .fla I don't have access.

I imported the sound and linked as "BackgroundMusic". As I didn't find any tutorials, I prompted ChatGpt and gave me this code:

import flash.media.Sound;
import flash.media.SoundChannel;
import flash.events.Event;

// Create a Sound object and a SoundChannel object
var bgMusic:BackgroundMusic = new BackgroundMusic();
var bgMusicChannel:SoundChannel;

// Function to start playing the music
function playMusic():void {
    // Stop any previously playing sound
    if(bgMusicChannel) {
        bgMusicChannel.stop();
    }
    // Play the new sound in a loop
    bgMusicChannel = bgMusic.play(0, int.MAX_VALUE);
}

// Function to stop playing the music
function stopMusic(event:Event):void {
    if(bgMusicChannel) {
        bgMusicChannel.stop();
    }
}

// Start playing the music when the scene is loaded
playMusic();

// Stop the music when the scene is removed from the stage
this.addEventListener(Event.REMOVED_FROM_STAGE, stopMusic);

Thanks to everyone taking the time to read and help ♥