cant get length of m4a audio file on webpage

I am trying to make a nodejs website that will return the length in seconds of any audio file a user chooses. So far I have it working with mp3, wav, and flac files. But it doesn't work for all .m4a or .aif files

The code for my HTML page with javascript is below:

choose audio file to get length:
<input style="cursor: pointer;" type="file" id="file" multiple="multiple" />

<script>

    //when files are selected:
    $("#file").change(async function (e) {
        console.log('file(s) selected')
        //get files 
        var files = e.currentTarget.files;
        //get number of files
        var numberOfFiles = files.length;
        //for each file
        for (i = 0; i < numberOfFiles; i++) {
            console.log(`songs[${i}].type=`, files[i].type)
            //get file length
            let songLength = await getSongLength(files[i]);
            console.log('songLength=', songLength)
        }

    });

    //recieve audio file, return length
    function getSongLength(song) {
        return new Promise(function (resolve, reject) {
            console.log('getSongLength() begin setup')
            //create objectURL and audio object for ssong
            objectURL = URL.createObjectURL(song);
            mySound = new Audio([objectURL])
            console.log('getSongLength() end setup')
            //when song metadata is loaded:
            mySound.addEventListener("canplaythrough", function (e) {
                console.log('getSongLength() canplaythrough')
                var seconds = e.currentTarget.duration;
                resolve(seconds)
            });

        });
    }

</script>

I gathered 6 different files for testing, and after running them on my above code have found out the following results:

• aif: not working
• flac: working
• m4a_file: not working
• m4a_file_from_comments_below:not working
• mp3: working
• wav: working

my test files for download: https://easyupload.io/m/la9xro

It seems like when I input my m4a file sample_M4A_file that it hangs inside the getSongLength() function and never enters the .addEventListener("canplaythrough" function, is there any alternative I can use to consistently get the duration in seconds for every audio file?

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