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A diagram of the Cooley-Tukey FFT algorithm

Fourier Analysis in a Nutshell

Fourier transforms are used to decompose waveforms into a set of discrete frequencies and to reconstitute them. This is how the core of the idea works ...
Random Number Generator

The Search for a Random Number Generator

A bit shifting random number generator makes a great, compact source of random numbers. It's quick and effective but is also very cute ...