Vf Code- <apex:page standardController="Feedbacks__c" docType="html-5.0" extensions="FeedbackHelper"> <apex:pageBlock > <apex:pageBlockSection > <apex:form > <style> a { color: #337ab7; } p { margin-top: 1rem; } a:hover { color:#23527c; } a:visited { color: #8d75a3; } body { line-height: 1.5; font-family: sans-serif; word-wrap: break-word; overflow-wrap: break-word; color:black; margin:2em; } h1 { text-decoration: underline red; text-decoration-thickness: 3px; text-underline-offset: 6px; font-size: 220%; font-weight: bold; } h2 { font-weight: bold; color: #005A9C; font-size: 140%; text-transform: uppercase; } red { color: red; } #controls { display: flex; margin-top: 2rem; max-width: 28em; } button { flex-grow: 1; height: 3.5rem; min-width: 2rem; border: none; border-radius: 0.15rem; background: #ed341d; margin-left: 2px; box-shadow: inset 0 -0.15rem 0 rgba(0, 0, 0, 0.2); cursor: pointer; display: flex; justify-content: center; align-items: center; color:#ffffff; font-weight: bold; font-size: 1.5rem; } button:hover, button:focus { outline: none; background: #c72d1c; } button::-moz-focus-inner { border: 0; } button:active { box-shadow: inset 0 1px 0 rgba(0, 0, 0, 0.2); line-height: 3rem; } button:disabled { pointer-events: none; background: lightgray; } button:first-child { margin-left: 0; } audio { display: block; width: 100%; margin-top: 0.2rem; } li { list-style: none; margin-bottom: 1rem; } #formats { margin-top: 0.5rem; font-size: 80%; } #recordingsList{ max-width: 28em; } </style> <script> 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" gumStream = 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; recordButton.disabled = false; 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); savingAudioFile(rec, rec.Name); } function createDownloadLink(blob) { console.log('===Blob====',blob); var recordId = '{!$CurrentPage.Parameters.Id}'; console.log('===RecordId==='+recordId); FeedbackHelper.uploadFile(recordId,blob,function(result,event){ if(event.status){ console.log(result); } }); var url = URL.createObjectURL(blob); var au = document.createElement('audio'); 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); //upload link var upload = document.createElement('a'); upload.href="#"; // upload.innerHTML = "Upload"; upload.addEventListener("click", function(event){ var xhr=new XMLHttpRequest(); xhr.onload=function(e) { if(this.readyState === 4) { console.log("Server returned: ",e.target.responseText); } }; var fd=new FormData(); fd.append("audio_data",blob, filename); xhr.open("POST","upload.php",true); xhr.send(fd); }) li.appendChild(document.createTextNode (" "))//add a space in between li.appendChild(upload)//add the upload link to li //add the li element to the ol recordingsList.appendChild(li); } </script> <html> <head> <title>Simple Recorder.js demo with record, stop and pause - addpipe.com</title> <!-- Latest compiled and minified Bootstrap CSS --> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"/> <link rel="stylesheet" type="text/css" href="style.css"/> </head> <body> <div id="controls"> <input id="recordButton" type="button" value="Recorder" onclick="startRecording();"/> <input id="pauseButton" type="button" value="Pause" onclick="pauseRecording();"/> <input id="stopButton" type="button" value="Stop" onclick="stopRecording();"/> </div> <div id="formats">Format: start recording to see sample rate</div> <p><strong>Recordings:</strong></p> <ol id="recordingsList"></ol> <!-- inserting these scripts at the end to be able to use all the elements in the DOM --> <script src="https://cdn.rawgit.com/mattdiamond/Recorderjs/08e7abd9/dist/recorder.js"></script> <script src="js/app.js"></script> </body> </html> </apex:form> </apex:pageBlockSection> </apex:pageBlock> </apex:page>

apex- global class FeedbackHelper {
    public FeedbackHelper(ApexPages.StandardController controller){        
    }
    @remoteaction
    global static void uploadFile(string recordId,string rec){
        system.debug('====='+rec);
        Attachment myattach = new Attachment(ParentId = recordId, Name = 'test.wav', Body = Blob.valueOf('' + rec), ContentType = 'audio/wav');
        insert myattach;
    }
    public PageReference savingAudioFile(Object rec, String recName){
        Feedbacks__c feed = new Feedbacks__c();
        insert feed;
        Attachment myattach = new Attachment(ParentId = feed.id, Name = recName+'.wav', Body = Blob.valueOf('' + rec), ContentType = 'audio/wav');
        insert myattach;
        system.debug('Attachmetn :: ' + myattach.name);
        return null;
    }
    public pageReference file(string fileLink){
        PageReference pr = new PageReference(fileLink);
        pr.setRedirect(true);
        return pr;
    }
}