Recording Audio Listened

Hello,
This is a repost of an earlier question that I am still struggling with.
I am trying to create a survey in which I present an audio file for the participants to listen to. However, I would like to record how much of the total audio the participants actually choose to listen to (how much they choose to skip, etc.). While I am very new to Javascript/ jQuery, a friend helped me write code to record this information in an embedded data field called "totalTime." This code is placed in on the survey page where the audio file is. However, when I tried to enter this code onto the question, the embedded data (placed at the start of the survey) always reports a value of 0 despite the amount of audio is listened to. The console log is reporting numbers, followed by NaN. Thanks for any help!

Qualtrics.SurveyEngine.addOnload(function()
{
/*Place your JavaScript here to run when the page loads*/
function roundNumber(number, digits) {
        var multiple = Math.pow(10, digits);
        var rndedNum = Math.round(number * multiple) / multiple;
        return rndedNum;
    };


    // variables to keep track of progress
    var audioListened = 0;
    var audioSkipped = 0;
    var lastPosition = 0;


    // initialize data to 0
Qualtrics.SurveyEngine.setEmbeddedData('totalTime', 0);


    var audio_element = jQuery("audio.qmedia") // HTML audio element to track

    // as the audio plays, we update the data with the total amount of time listened
    audio_element.on('timeupdate',  function(event) {
        audioListened = event.currentTime - audioSkipped;
lastPosition = event.currentTime;
console.log(audioListened)
Qualtrics.SurveyEngine.setEmbeddedData('totalTime', audioListened )
})


// when participant skips time, we keep track of this to subtract from total time
    audio_element.on('seeked', function(event) {
        audioSkipped = (event.currentTime - lastPosition); 
console.log(audioSkipped)
});



});


Qualtrics.SurveyEngine.addOnReady(function()
{
/*Place your JavaScript here to run when the page is fully displayed*/


});


Qualtrics.SurveyEngine.addOnUnload(function()
{
/*Place your JavaScript here to run when the page is unloaded*/


});