Change recording file

i'm recording voice,saving,Moving it in my project, it saved normally to DB and moved to the public but with different names so how can i change one of those names to be the same so i can view them in the show blade.

move function

   public function upload_record(Request $request)
    {

        if($request->file('recorder')){

                    $file=$request->recorder;


                  $name =md5_file($request->file('recorder')->getRealPath());
                   $destinationPath = public_path('/audios/observationAudios/');
                  $file->move($destinationPath, $name.".wav");
        }
    }

Store Script

    <script>
//webkitURL is deprecated but nevertheless
  URL = window.URL || window.webkitURL;

var gumStream; //stream from getUserMedia()
var rec; //Recorder.js object
var input; //MediaStreamAudioSourceNode we'll be recording

// shim for AudioContext when it's not avb.
var AudioContext = window.AudioContext || window.webkitAudioContext;

var audioContext //audio context to help us record

var recordButton = document.getElementById("recordButton");
var stopButton = document.getElementById("stopButton");
var pauseButton = document.getElementById("pauseButton");
//add events to those 2 buttons
recordButton.addEventListener("click", startRecording);
stopButton.addEventListener("click", stopRecording);
pauseButton.addEventListener("click", pauseRecording);

function startRecording() {
    console.log("recordButton clicked");

    /*
     Simple constraints object, for more advanced audio features see
     https://addpipe.com/blog/audio-constraints-getusermedia/
     */

    var constraints = {
        audio: true,
        video: false
    }

    /*
     Disable the record button until we get a success or fail from getUserMedia()
     */

    recordButton.disabled = true;
    stopButton.disabled = false;
    pauseButton.disabled = false

    /*
     We're using the standard promise based getUserMedia()
     https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia
     */

    navigator.mediaDevices.getUserMedia(constraints).then(function(stream) {
        console.log("getUserMedia() success, stream created, initializing Recorder.js ...");

        /*
         create an audio context after getUserMedia is called
         sampleRate might change after getUserMedia is called, like it does on macOS when recording through AirPods
         the sampleRate defaults to the one set in your OS for your playback device

         */
        audioContext = new AudioContext();

        //update the format
        document.getElementById("formats").innerHTML = "Format: 1 channel pcm @ " + audioContext
            .sampleRate / 1000 + "kHz"

        /*  assign to gumStream for later use  */
        gumStream = stream;

        /* use the stream */
        input = audioContext.createMediaStreamSource(stream);

        /*
         Create the Recorder object and configure to record mono sound (1 channel)
         Recording 2 channels  will double the file size
         */
        rec = new Recorder(input, {
            numChannels: 1
        })

        //start the recording process
        rec.record()

        console.log("Recording started");

    }).catch(function(err) {
        //enable the record button if getUserMedia() fails
        recordButton.disabled = false;
        stopButton.disabled = true;
        pauseButton.disabled = true
    });
}

function pauseRecording() {
    console.log("pauseButton clicked rec.recording=", rec.recording);
    if (rec.recording) {
        //pause
        rec.stop();
        pauseButton.innerHTML = "Resume";
    } else {
        //resume
        rec.record()
        pauseButton.innerHTML = "Pause";

    }
}

function stopRecording() {
    console.log("stopButton clicked");

    //disable the stop button, enable the record too allow for new recordings
    stopButton.disabled = true;
    //false->true 1 recored
    recordButton.disabled = true;
    pauseButton.disabled = true;

    //reset button just in case the recording is stopped while paused
    pauseButton.innerHTML = "Pause";

    //tell the recorder to stop the recording
    rec.stop();

    //stop microphone access
    gumStream.getAudioTracks()[0].stop();

    //create the wav blob and pass it on to createDownloadLink
    rec.exportWAV(createDownloadLink);

}
var blob= new Blob({type:'audio/wav'});
function createDownloadLink(blob) {

    var url = URL.createObjectURL(blob);

    var au = document.createElement('audio');
    // au.setAttribute('name', 'recorder');
    var li = document.createElement('li');
    var link = document.createElement('a');
    //name of .wav file to use during upload and download (without extendion)
    var filename = new Date().toISOString();

  //add controls to the <audio> element
     au.controls = true;
     au.src = url ;
            //save to disk link
    link.href = url
    link.download = filename + ".wav"; //download forces the browser to donwload the file using the  filename
          // link.innerHTML = "Save to disk";

    //add the new audio element to li
    li.appendChild(au);

    //add the filename to the li
    li.appendChild(document.createTextNode(filename + ".wav "))

    //add the save to disk link to li
    li.appendChild(link);


    inputElemFile = document.createElement('input')
    inputElemFile.name = "recorder_file"
    inputElemFile.value = blob //string // file
    inputElemFile.type = 'hidden'
    inputElem = document.createElement('input')
    inputElem.name = "recorder"
    inputElem.value = filename + ".wav" //string // file
    inputElem.type = 'hidden'
    var inputDiv = document.getElementById('input-audio');
    inputDiv.append(inputElem);
    inputDiv.append(inputElemFile);

    var xhr = new XMLHttpRequest();
    xhr.onload = function(e) {
        if (this.readyState === 4) {
            console.log('save...!')
        }
    };

    var fd = new FormData();
    fd.append("recorder", blob, filename + '.wav');

    xhr.open("POST", "{{ route('upload.voice.record') }}", true);
    xhr.send(fd);




    //add the li element to the ol
    recordingsList.appendChild(li);
}

    </script>

Controller Request

        $observe->recorder = $request->recorder;

create.blade

                                        <div class="tab-pane fade " id="v-pills-bill-record" role="tabpanel"
                                            aria-labelledby="v-pills-bill-record-tab">


                                            <p width="20%"
                                                style="vertical-align: top; font-weight: 900; padding: 0px !important; border-color: white; height:25px">
                                                <i class="fa fa-microphone" aria-hidden="true"></i> Voice Record
                                            </p>

                                            <div id="controls">
                                                <button id="recordButton"
                                                    style="height: 33px; width: 288px; border: 1px solid white;"><i
                                                        class="fa fa-microphone" aria-hidden="true"> </i> Voice
                                                    Record </button>
                                                <button hidden id="pauseButton" disabled> Pause </button>
                                                <button id="stopButton" style="height: 33px;width: 82px;" disabled>
                                                    Stop </button>
                                            </div>
                                            <div id="formats" style="display: none">Format: start recording to see
                                                sample rate
                                            </div>
                                            <ol style=" margin-top: 20px" id="recordingsList"></ol>
                                            <div id="input-audio"></div>