I have been trying to find an example of this that I could use for a couple years, I'm ashamed to admit. I would like to see a working, compileable example (most that I find online don't compile or don't actually work) of reading from the microphone, encoding the voice data in a speech-friendly encoding such as Speex, and streaming that information in real time to a Decoder which then plays the audio. I suppose this example would simply echo what is said. I would like to ultimately use this to learn to make an audio mixing chat server.