| Execute floating point FFT |
 Choose "Start without debugging" in the debug menu.  Then FftFloat project starts and choose "FFT" -> "Read
input and trigonometric".  FloatingIn.txt, the source of input wave, and FloatingTri.txt, the source of trigonometric function, are read and drawn. Each wave has 1.0 as their dynamic range.  Choose FFT execution .  Then spectrum appears and 6000Hz shows up at the peak. Find that it's symmetry
as to Nyquist Frequency. 
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