How to record a mp3 sound in flash

programming flash
1

Hello ther,
I’m using Flash 8 and Flash media Server to save an audio from a mic to the server.
Actually the actionscript code is saving the recorded audio in flv format but i want it to be in mp3 format. Can some1 help me, part of the code is:

function doRecord(_file_name_loc:String) {
_file_name_loc = _file_name;

if (Record_btn.getLabel() == “Record”) {
circle._xscale = circle._yscale = client_mic.activityLevel+20;
out_ns.attachAudio(client_mic);
out_ns.publish(_file_name_loc, “record”);