How to play sound from a proprietary format

Question

I would like to convert a small java applet to flex as3
The current applet connects  to a remote server to receive audio in a proprietry compressed and encrypted format using a tcp connection (the data is encoded as text)
It then decrypts, decompresses the audio and uses java sound to play it.
Looking at the as3 classes all I could find is a sound object that seems to only play mp3 audio and a urlrequest object that is used to download (what about streaming) mp3 audio from a server.
I am looking for a simple sample that will incorporate retreving data from a server (perhaps using the http service) into e.g. a byte array, and playing pcm audio from a byte array.
Ideally it would be a small set of files (1?) that I can compile using mxmlc; I am not good with IDEs, linux command line is my thing
Thanks

Answer 1

Maciek, many thanks!
Here's sample code showing how to stream audio in arbitrary format and play it
// File: Player.as
// When running from local storage (during developement)
// compile mxmlc -use-network=false Player.as
// otherwise loading the local raw audio file fails with error 2148
// The input audio format is 16 bit little endian 44.1Khz mono.
package
    import flash.display.Sprite;
    import flash.text.TextField;
    import flash.media.Sound;
    import flash.media.SoundChannel;
    import flash.events.Event;
    import flash.events.SampleDataEvent;
    import flash.net.URLRequest;
    import flash.net.URLStream;
    public class Player extends Sprite
        private var sourceUri:String = "audio.44.raw";
        private var sound:Sound = new Sound();
        private var soundChannel:SoundChannel = new SoundChannel();
        private var playing:Boolean;
        private var stream:URLStream;
        private var request:URLRequest;
        private var statusLine:TextField = new TextField();
        public function Player()
            statusLine.width = 400;
            statusLine.text = "Starting...";
            addChild(statusLine);
            getAudio();
            start();
        public function getAudio():void
            stream = new URLStream();
            request = new URLRequest(sourceUri);
            try {
                stream.load(request);
            } catch (error:Error) {
                statusLine.text = "Failed to load " + request.url + " : " + err!
        private function playCallback(event:SampleDataEvent):void
            var value:Number;
            var i:int, cnt:int;
            // Input is 16bit PCM, each sample occupies 2 bytes
            cnt = stream.bytesAvailable / 2;
            if (cnt >= 8192 || playing) {
                playing = true;
                statusLine.text = request.url + " : playing...";
                if (cnt > 8192)
                    cnt = 8192;
                for (i = 0; i < cnt; i++) {
                    // Convert 16bit little edndian pcm samples to numbers
                    value = stream.readUnsignedByte() + 256 * stream.readUnsign!
                    if (value > 32767)
                        value -= 65536;
                    value /= 10000; //Adjust the volume
                    // Input is mono, write to both channels
                    event.data.writeFloat(value);
                    event.data.writeFloat(value);
                if (cnt < 2048)
                    statusLine.text = request.url + " : done...";              !
            else {
                // Wait until enough data is bufferred
                statusLine.text = request.url + " : buffering...";
                for (i = 0; i < 8192; i++) {
                    event.data.writeFloat(0);
                    event.data.writeFloat(0);
        private function start():void
            soundChannel.stop();
            sound.removeEventListener(SampleDataEvent.SAMPLE_DATA,playCallback);
            playing = false;
            sound.addEventListener(SampleDataEvent.SAMPLE_DATA,playCallback);
            soundChannel = sound.play();