I'd like to be able to track how loud the song gets in realtime, returning a number to represent the current volume of the song. The source is from a sample that plays when you click it. Ive seen tutorials on making a volume meter, but all I want is a number to measure this. here is my starting code.

const audioContext = new AudioContext();

const samplebutton = document.createElement('button')
samplebutton.innerText = 'sample'
samplebutton.addEventListener('click', async () => {
    let volume = 0
    const response = await fetch('testsong.wav')
    const soundBuffer = await response.arrayBuffer()
    const sampleBuffer = await audioContext.decodeAudioData(soundBuffer)
    const sampleSource = audioContext.createBufferSource()
    sampleSource.buffer = sampleBuffer

    sampleSource.connect(audioContext.destination)
    sampleSource.start() 
    
function TrackVolume(){
}