Microphone record, playback in AIR html js desktop app

Question

hi,
I want to record, save and playback the microphone audio in an HTML/JS AIR desktop app.
I can't find any examples so my code is based on AS3.
But the app crashes almost right away when the SampleDataEvent handler function is called.
Should it be in a while loop sames as AS3?
$(function(){
    var mic;
    var soundBytes = new air.ByteArray();
    $("#btnRecord").click(function(){
        mic = air.Microphone.getMicrophone();
        mic.rate = 44;
        mic.addEventListener(air.SampleDataEvent.SAMPLE_DATA, sampleEvent);
    function sampleEvent(e){
        while (e.data.bytesAvailable) {
            var sample = e.data.readFloat();
            soundBytes.writeFloat(sample);
    $("#btnStop").click(function(){
        mic.removeEventListener(air.SampleDataEvent.SAMPLE_DATA, sampleEvent);
        $("#txtActivity").val("");
    $("#btnPlay").click(function(){;
        for (var i = 0; i < 8192 && soundBytes.bytesAvailable > 0; i++) {
            var sample = soundBytes.readFloat();
            e.data.writeFloat(sample);
            e.data.writeFloat(sample);
            //we write the data twice because there are 2 channels (stereo)
thanks,
Jeff.

Answer 1

this works on my macbook. But on my Windows 8.1 machine the audio gets played back twice as slow as normal.
Not a lower pitch, just twice as slow. Any idea why this is?
$(function(){
    var s;
    var sc;
    var nowRecording = false;
    var nowPlaying = false;
    var recordedBytes = new air.ByteArray();
//   air.SoundMixer.audioPlaybackMode = window.runtime.flash.media.AudioPlaybackMode.VOICE
    var mic = air.Microphone.getMicrophone();
    mic.rate = 44;
    mic.gain = 70;
    mic.setSilenceLevel(0);
    $("#btnRecord").click(function(){
        if (!nowRecording) {
            air.trace("recording");
            recordedBytes.clear();
            mic.addEventListener(air.SampleDataEvent.SAMPLE_DATA, getMicAudio);
            nowRecording = true;
            $(this).val("Click me to stop")
        else {
            air.trace("recording stopped");
            mic.removeEventListener(air.SampleDataEvent.SAMPLE_DATA, getMicAudio);
            nowRecording = false;
            $(this).val("Click me to record")
    function getMicAudio(e){
        recordedBytes.writeBytes(e.data);
    $("#btnPlay").click(function(){
        if (!nowPlaying) {
            air.trace("playing");
            recordedBytes.position = 0;
  s = new air.Sound();
            s.addEventListener(air.SampleDataEvent.SAMPLE_DATA, playAudio);
  sc = new air.SoundChannel
            s.play();
           sc.addEventListener(air.Event.SOUND_COMPLETE, stopPlayback, false, 0, true);
            nowPlaying = true;
          //  $(this).val("Click me to stop playing")
        else {
            sc.stop();
            stopPlayback();
    function stopPlayback(e){
        air.trace("playing stopped");
        s.removeEventListener(air.SampleDataEvent.SAMPLE_DATA, playAudio);
        nowPlaying = false;
    function playAudio(e){
  if(!recordedBytes.bytesAvailable > 0)
  return;
        for (var i = 0; i < 8192; i++) {
            var sample = 0;
  if(recordedBytes.bytesAvailable > 0) sample = recordedBytes.readFloat()
            e.data.writeFloat(sample);
            e.data.writeFloat(sample);