Yeah , that 's wh
No. I  I  I  I don't proth process the  the fundamental. I   I , ehm  I calculate the  the phase derivate using the FFT.
Yeah.
And  The algorithm said that , eh ,  if you  if you change the  the   the , eh , nnn  the X - the frequency " X " , eh , using the in the instantaneous frequency , you can find , eh , how , eh , in several frequencies that proba probably the  the harmonics , eh ,