Programmer Guide/SPU Reference/PZTF

[SPU PZTF SP DF F0 FMIN FMAX NC IINT NC NN ND IALG OUT F0 ENV C NZ NP F R H E] pole-zero model estimation

In: SP vec log. amplitude spectrum (no default) DF num frequency resolution in Hz (no default) F0 num fundamental frequency in Hz (estimated if not supplied) F1,F2 num component search range for f0 estimation in Hz (75-4000Hz) NC num number of f0 components to use for harmonic mean (5) IINT num/str envelope interpolation method (0=Linear, 1=Qaudratic, 2=SPLine) (0=Linear) NN num number of numerator coefficients (>0) (no default) ND num number of denominator coefficients (>1) (no default) IALG num/str pole-zero algorithm (0=WLLS, 1=ND) (1=ND)

Out: F0 num fundamental frequency in Hz (input or estimated, 0 for error) ENV vec log. spectrum envelope C vec numerator and denominator coefficients NZ num number of zeros NP num number of poles F vec frequency of zeros and poles R vec radius of zeros and poles H vec log. amplitude response E num error (avr((ENV - H)^2)