I mean , a short - time FFT  short - time cepstrum calculation , uh , mean  u mean calculation work that people have in commercial systems , they do this all the time. They  the  they calculate it from previous utterances and then use it , you know.
Yeah , um.
But  but , uh , as you say , there hasn't been that much with this long  long - time , uh , spectra work.
Oh , o Oh , OK.