Stores binary data as WAV audio, for whatever reason

This program/library is the result of two classmates' collaboration for the final task of their programming class. It is actually not what they are supposed to do, but their programming teacher is pretty chill.

It was Ludvig who had the idea for the project. He has long been fascinated by 1980's computers, and in particular their methods of storing data on casette tapes in an audible format.

LHAudio uses a special, homebrew format for file storage inside of "regular" (more on that later) WAV files. It is structured as follows:

• Magic number
• File name
• Magic number
• SHA1 checksum of the file
• Magic number
• The file data
• Magic number (again)

The format is structured in such a way that storage of multiple files in one WAV file is possible.

LHAudio's magic number is simply 256 bytes containing the numbers 255 to 0. This is very large for a magic number, and the reason for that is that because of our design, the data can not contain the magic number. Originally we were planning to use the numbers 0 255 0 255 as a magic number, but when we tested the program with a PNG image, we discovered the image contained this number multiple times.

Apart from the previously mentioned limitations of the magic number, there are a number of other limitations of our format:

• Only works with 8-bit audio
• Only works with mono audio
• Doesn't work with recordings of the original sound (i.e. you can not extract the data from a recording of a speaker playing the original WAV file)

The LHAudio Python module contains two functions, encode() and decode().

The encode() function takes two arguments, the first is a list containing the names of the files to encode, and the second is a WAV file to encode them in.

The decode() function takes two arguments, the first is the input WAV file, and the second is the directory to store the files in.

The LHAudioQt GUI uses PyQt and Phonon to form a user interface for the LHAudio module.

It is able to encode files and decode LHAudio files, and it can also play the encoded files.

The Python module, written by Ludvig, is pretty much finalized and works quite well.

The GUI, written by Hugo, is usable, even though it is a hacked together piece of crap.

For more detailed information, check TODO.md.