Fourier Transform is basic instrument for spectrum analyze of signals. Make Fast Fourier Transform (FFT) implementation in your favourite language, try to compute the spectrum on sample sound file and to visualize it.
You can code the solution in any programming language during the weekend and have to submit it to email@example.com latest on Sunday May 25th.
On Monday we will upload the solutions on GitHub https://github.com/OLIMEX/WPC
You can play with your real name or with nick if you want to be anonymous, we will not disclosure your personal info if you do not want to.