I can't use WebRTC yet because I want to have support for IE and especially Safari & Mobile Safari. I want to add audio for an iOS App[1] that's using jsmpeg[2] for video streaming.
IE doesn't support Web Audio either. The project I linked above does contain a Flash shim for IE, which you may find helpful.
Any proper realtime audio stack (which ogv.js is not: it targets moderate latency streaming) is going to require a jitter buffer to deal with network/processing latency variation. Writing one is a non-trivial exercise (though not impossibly so).
In any case, I'd recommend using Opus (the audio codec used by WebRTC) over Speex.
I can't use WebRTC yet because I want to have support for IE and especially Safari & Mobile Safari. I want to add audio for an iOS App[1] that's using jsmpeg[2] for video streaming.
[1] http://instant-webcam.com/
[2] https://github.com/phoboslab/jsmpeg