How do I input keystrokes with a guitar?

tipkalo

Honorable
Sep 21, 2012
2
0
10,510
Hello people!
I need help, it's for a competition with a prize at the end, but I don't even know where to start!

The main idea is that I want to be able to literally type on the computer with my guitar.
The more in depth explanation of that is that I want to somehow make my computer anylyse the sound my guitar makes,
and for every specific range of frequency (for every tone) to input a letter or any key on the computer.
Please help me cause I really want to win that competition, so I am gonna try hard to put that system together!