This is really cool. It looks a lot like baudline; have you ever used that?

Thanks, no I have not, but always interesting to look at similar tools. I'm more interested in going in the gaming direction though (like trying to follow a song singing/whistling, or by making it multiplayer somehow) I was inspired by plink (by dinahmoe)

This looks nice. Any chance this is going to be open source?

Thanks, I might open source the prototype/early version here, but not the whole project (I intend to add a lot more stuff and make it gaming-oriented)