I'm not going to pretend to be typical (I've been resisting Twitter until just today), but I find audio to be highly inconvenient (you need to be able to hear it, you need to not be disturbing others when you play it, it doesn't random access or search well, etc). As far as I can tell, a large part of twitter is the convenience of broadcasting and receiving. The two don't seem very compatible to me. What misconception or mistaken premise is stopping me from seeing how this works?