matlab - Wrong data scaling while using fdatool -


i have same problem presented in this question, it's solution doesn't work me , don't know why.

i have sound (wav) data strong fundamental frequency (225 hz, sample rate 96 000, amplitude ca. 0.2) , want design passband filter eliminate f0. using fdatool have designed desired passband filter (from 220 230 hz, -10 db @ 210 , 240 hz) , exported sos , g.

  • if use sosfilt, data ok, not scaled correctly (amplitudes @ e30 or higher).
  • if use sos2tf , filt or filtfilt, data still ok, still incorrectly scaled (amplitudes @ e-19).

what doing wrong?


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