What is Steg?
It's a command line program written in C that converts plain text messages into .wav files, enabling you to hide messages within sound clips such as music.
How do I use it?
Clone the repo with git clone git@github.com:ZoeB/steg.git, go into that directory with cd steg, compile the program with make, and run it with a message you'd like to encode, such as ./steg 'Foo'. Steg will create a new file, out.wav, with your message encoded in it.
There are various command line arguments available. Run ./steg without a message for a list of them.
How can I read the message again?
With a spectrogram of the waveform. There are many ways of generating a spectrogram. As an example, I'd recommend Spek.
Who made it?
The bulk of the program was written by Zoë Blade. The .wav file writing routine was written by Douglas Thain.
What license is it released under?
It's released under the CC BY 4.0 license.