Flex Sound extract and save mp3

I'm trying to rig up a basic mp3 cutter in Flash (using the Flex framework)

I have gotten so far:

var ba:ByteArray=new ByteArray();
sound.extract(ba, playEnd - pla开发者_如何转开发yStart, playStart);

This extracts the relevant bytes from the sound object and stores them in ba

Then, I do this:

saveFile=new FileReference();
saveFile.save(ba, sound.id3.artist + " - " + sound.id3.songName + ".mp3");

The file saves properly, but it can not be played (Players say it is corrupted)

Any pointers as to how I can create a valid mp3 file from the byteArray obtained after the extraction?

Thanks,

Pranav

I have written many articles on audio processing with Flash on my blog. Here is one that you might find helpful:

http://labs.makemachine.net/2010/07/slice-tool-looper/

This article outlines how to use the microphone to record audio and also includes some info on saving audio files:

http://labs.makemachine.net/2011/04/record-visualize-save-microphone-input/

I would suggest using the wave format to save your file rather the mp3, it will save you a lot of time. Just look up the wave format and make your own class. You can have a look at this guy's class (henke37 post) : http://www.actionscript.org/forums/showthread.php3?t=256774 which can give you a start on how to do it. If you want to play your sound back later on, you will need to make a wave loader though.