Another approach to understanding fourier transforms at the esteemed BetterExplained: http://betterexplained.com/articles/an-interactive-guide-to-the-fourier-tr

Another approach to understanding fourier transforms at the esteemed BetterExplained: http://betterexplained.com/articles/an-interactive-guide-to-the-fourier-transform/ http://betterexplained.com/articles/an-interactive-guide-to-... This is more about the actual Fourier Transform operation itself, rather than the FFT algorithm. OTOH, it has whizzy interactive animations. The thing that made it simpler to me was the fact that an FT takes us from an oscilloscope to a spectrum analyser and back again.