Draw an audio waveform from recorded sound

Question

I have problem with draw static waveform from recorded sound. Here is an example of which I wanted to use: http://cookbooks.adobe.com/post_Draw_an_audio_waveform_from_an_MP3_file-16767.html
Here is an excerpt of my code, where the recorded sound, and I play it:
    public function startRecording():void
                stop.enabled=true;
                soundClip = new ByteArray();
                microphone = Microphone.getMicrophone();
                microphone.rate = 44;
                microphone.gain = 100;
                microphone.addEventListener(SampleDataEvent.SAMPLE_DATA, microphone_sampleDataHandler);              
            public function stopRecording():void
                play.enabled=true;
                microphone.removeEventListener(SampleDataEvent.SAMPLE_DATA, microphone_sampleDataHandler);
                level.width = microphone.activityLevel * 0;
                level.height = microphone.activityLevel * 0;
            protected function microphone_sampleDataHandler(event:SampleDataEvent):void
                level.width = microphone.activityLevel * 1;
                level.height = microphone.activityLevel * 1;
                while (event.data.bytesAvailable)
                    var sample:Number = event.data.readFloat();
                    soundClip.writeFloat(sample);
            public function startPlaying(soundClip:ByteArray):void
                this.soundClip = soundClip;
                soundClip.position = 0;
                                sound = new Sound();
                sound.addEventListener(SampleDataEvent.SAMPLE_DATA, sound_sampleDataHandler);
                channel = sound.play();
            protected function sound_sampleDataHandler(event:SampleDataEvent):void
                if (!soundClip.bytesAvailable > 0)
                    return;
                for (var i:int = 0; i < 8192; i++)
                    var sample:Number = 0;
                    if (soundClip.bytesAvailable > 0)
                        sample = soundClip.readFloat();
                    event.data.writeFloat(sample);
                    event.data.writeFloat(sample); 
Is there any other way than to save the recorded sound as mp3 (which will also be complicated), or can I use this example given and work on ByteArray? I tried to redo it a little, I'm sitting on this already a lot of time and unfortunately to no avail. Any ideas? Tips?
I would like to compare the recorded sound with the original. Draw waveform will be the first step. Maybe you also have some tips of how to compare the two sounds?
I would be very grateful for every answer,
Lilly

Answer 1

Maybe not related to your problem, but your plugins list shows outdated plugin(s) with known security and stability risks.
# Shockwave Flash 10.0 r32
# Next Generation Java Plug-in 1.6.0_17 for Mozilla browsers
Update the [[Java]] and [[Falsh]] plugin to the latest version.
See
http://java.sun.com/javase/downloads/index.jsp#jdk (you need JRE)
http://www.adobe.com/software/flash/about/
See [[No sound in Firefox]] and [[Video or audio does not play]]