FourierTransform.py

Computing the Fourier-coefficients of a signal, and using the first ones for reconstructing it using an interactive slider

Dialtones.py

Given is a signal consisting of different signals, coming from pressing different numbers on a cell phone. The Goal is to find out, which numbers have been dialed,

First we divide the signal into 6 parts, one for every tone. Then we apply the DFT to look at the signals. Then we can conclude, wich number has been dialed.