What are you working on? March / April 2014

VincentYu

This is the supposedly-bimonthly-but-we-keep-skipping 'What are you working On?' thread. Previous threads are here. So here's the question:

What are you working on?

Here are some guidelines:

Focus on projects that you have recently made progress on, not projects that you're thinking about doing but haven't started.
Why this project and not others? Mention reasons why you're doing the project and/or why others should contribute to your project (if applicable).
Talk about your goals for the project.
Any kind of project is fair game: personal improvement, research project, art project, whatever.
Link to your work if it's linkable.

This is the supposedly-bimonthly-but-we-keep-skipping 'What are you working On?' thread. Previous threads are here. So here's the question:

What are you working on?

Here are some guidelines:

Focus on projects that you have recently made progress on, not projects that you're thinking about doing but haven't started.
Why this project and not others? Mention reasons why you're doing the project and/or why others should contribute to your project (if applicable).
Talk about your goals for the project.
Any kind of project is fair game: personal improvement, research project, art project, whatever.
Link to your work if it's linkable.

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.