A similar Demo in which the Fourier transformation is performed by the "quick" component DSXFastFourier rather than by the ftu() routine can be downloaded from here (source included).

UnitMain.pas
DSXFastFourier.zip
FFT_Demo_DSX.cfg
FFT_Demo_DSX.dof
FFT_Demo_DSX.dpr
FFT_Demo_DSX.exe
FFT_Demo_DSX.res
GNU_GP_LICENSE.txt
Lenna.bmp
README.txt
UFFT2D.dcu
UFFT2D.pas
UnitMain.dcu
UnitMain.ddp
UnitMain.dfm

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