Have you ever thought what a bitcoin would sound like ?
One of the projects I started before bitcoin came along was a Java modulator/ demodulator for the Ham Radio digital mode called PSK31. (
http://aintel.bi.ehu.es/psk31.html).
The basic idea is to convert typed text into a narrow bandwidth signal that you can pump out of a ham radio.
Anyhow, I realised that it could be used to convert bitcoin URIs into an audio stream that you could use to, say, encode a payment URI into an MP3 or any other sort of audio signal.
I have resurrected the code and put it in its current, grumbling, rough as a broken bottle form into github.
It is at:
http://jdigi.net which relocates to:
https://github.com/jim618/jdigi I have put it in a separate project as a Java PSK31 codec would be more generally useful than just for bitcoin.
There is a modulator at: net.jdigi.modems.bpsk.BPSKModulator and a demodulator with spectrum analyser (a waterfall display) at: net.jdigi.ui.JDigi (the demodulator is not fully working yet).
It is a pretty experimental idea but if you are interested watch the code in github or drop me a line.
