RecorderRTC: Use StereoAudioRecorder BT#18287

After the upgrade of the library here:

c52b41287e

The audio recorder didnt work. Wav files were not created/saved.
Tested with chrome and firefox.

main/inc/lib/javascript/record_audio/record_audio.js

@@ -1,8 +1,6 @@
 /* For licensing terms, see /license.txt */
 
 window.RecordAudio = (function () {
-    var isSafari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent);
-
     function startTimer() {
         $("#timer").show();
         var timerData = {
@@ -126,9 +124,10 @@ window.RecordAudio = (function () {
                 stopTimer();
                 startTimer();
                 recordRTC = RecordRTC(stream, {
-                    recorderType: isSafari ? RecordRTC.StereoAudioRecorder : RecordRTC.MediaStreamRecorder,
+                    recorderType: RecordRTC.StereoAudioRecorder,
                     type: 'audio',
                     mimeType: 'audio/wav',
+                    numberOfAudioChannels: 2
                 });
                 recordRTC.startRecording();
 
@@ -187,6 +186,7 @@ window.RecordAudio = (function () {
                 return;
             }
 
+            console.log('stop');
             stopTimer();
             recordRTC.stopRecording(function (audioURL) {
                 btnStart.prop('disabled', false).removeClass('hidden');

main/template/default/learnpath/record_voice.tpl

@@ -31,8 +31,6 @@
 
 <script>
     $(function() {
-        var isSafari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent);
-
         function startTimer() {
             $("#timer").show();
             var timerData = {
@@ -73,7 +71,7 @@
             clearInterval(window.timerInterval);
         }
 
-        function useRecordRTC(){
+        function useRecordRTC() {
             $('#record-audio-recordrtc').show();
 
             var audioTitle = $('#audio-title-rtc');
@@ -93,9 +91,10 @@
                     stopTimer();
                     startTimer();
                     recordRTC = RecordRTC(stream, {
-                        recorderType: isSafari ? RecordRTC.StereoAudioRecorder : RecordRTC.MediaStreamRecorder,
+                        recorderType: RecordRTC.StereoAudioRecorder,
                         type: 'audio',
                         mimeType: 'audio/wav',
+                        numberOfAudioChannels: 2
                     });
                     recordRTC.startRecording();