I didn't win a Pi Zero. I don't know if I'll be able to get one, but I'll keep working on this project. I was going to build this thing anyway.

It's too late to work on it tonight. I've been busy for a while trying to catch up after that week of influenza misery, so I haven't made a lot of progress, but I did write a chunk of the code(for audio input, frequency detection and recording). It's not fully tested yet, so I shouldn't post it here till I get it working well.