Generating a Binary Signal

How do I generate a binary signal and export the file as a audio file (.wav,.mp3,etc)?

EDIT:

I want to generate a pulse that has high and lows. I would also like to be able to control the relative proximities of the highs and lows and store this pulse as a .wav file. So when I play this pulse and analyze it with an oscilloscope I expect to see something like this http://upload.wikimedia.org/wikipedia/commons/5/55/NRZcode.png with the troughs at 0 volts

[Jan]

This question is too general to be answered efficiently. What exactly do you want and can you imagine any method to create a non-binary signal on a computer?

[Walter Roberson]

Ternary, Jan! http://en.wikipedia.org/wiki/Ternary_computer

[Jahangir]

which i can later translate into binary through a device I'm building

Answer 1

[Walter Roberson]

You cannot control the relative proximity of the highs and lows in a .wav file, as .wav files are fixed frequency.

If fixed frequency is acceptable, then just generate your data as a column vector and use wavwrite() on it.