Works Works before ISA
F0 histograms in lin/st scale
My fast F0 analysis is done by bandpass filtering the time signal and then searching every voice period in the time signal using my unique method. By searching in the time signal, each voice period can be determined with high accuracy F0, and even small variations in the fundamental frequency can be seen.
My unique F0 algorithm also makes it possible to determine the jitter and the shimmer.
My F0 algorithm has been in use for 39 years
since 1984 and has been running in real time on the
NEC's µPD7720 signal
processor since 1985, 38 years ago.
Analysis pictures I have coded from the very beginning in Neon object-oriented programming language.
Who else would have done pitch analysis in Finland already on 1984, 39 years ago, and already on 1985 in real time?
My F0 analysis I have coded as a DSP man totally from zero to machine languages.
Hz is converted to st by the
formula x/st=57+12log2(f/440) ja
St is converted to Hz by the
formula f/Hz=440(2(x-57)/12).
F0 distribution on a semitone scale.
F0 distributionw on a semitone scale.
F0 distribution on a semitone scale.
F0 distribution on a tenth semitone scale.