A client for http://chirp.io in Python https://github.com/moreati/chirppy

I started this over Christmas, and I've been poking at it on and off since then - firstly trying (and failing) to reimplement the error correction. The extent of my knowledge there is http://math.stackexchange.com/questions/663643/discover-parameters-of-a-reed-solomon-code-from-its-output.

My current effort is to implement the audio as continuous phase - so there are no discontinuities in the chirp, which make a nasty click noise in the current implementation. Doing so, I've learned a lot about acoustic modems and amateur radio modulations.