FFT

[GENERIC-FUNCTION]


OM-SuperVP
Function Reference
ARGUMENTS:
  - INFILE  
&key
 
  - BEGIN-TIME  
  - END-TIME  
  - WINDOWSIZE [default = 4096]
  - FFTSIZE [default = 4096]
  - STEP [default = 256]
  - WINDOWTYPE [default = "hanning"]
  - GABARIT [default = 1]
  - OUT [default = "fft.sdif"]

Description:

Calculates the FFT of a Sound file using SuperVP.
The results of analysis are stored in an SDIF file which pathname is returned.

- <infile> : pathname or SOUND object to be analysed

- <begin-time> : begin time of the analysis

- <end-time> : end time of the analysis

- <windowsize> : number of samples of the analysis window

- <fftsize> : number of points in fft

- <step> : number of samples between two successive analysis windows

- <windowtype> : shape of the analysis window

- <gabarit> : output fft format
0 = logarithmic amplitudes
1 = amplitude
2 = phase
3 = phase, amplitude
4 = frequency, amplitude
5 = real, imaginary
Note that only sdiffiles at gabarit 3 and 5 can be used to recalculate a sound file using IFFT.

- <out> : output file pathname



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