Working with sound

I would like to create an “audio mixer” in flash that can help users to merge various instruments/beats and develop their own track. The issue that I have now is the saving. Can someone guide me on whether flash can save this dynamically created audio to wav/mp3 formats?
If it can do it within itself, how?
and if it can’t, are there any external programs which can record and save this recorded file for me?
an example would be this : http://beaterator.rockstargames.com/beaterator.html
however, rockstar games wont let me speak to their developers :slight_smile:
Any references or assistance will be greatly appreciated.

Thank you