Changing dB / Octave by frecuency on filtergraph~ and biquad~


    Apr 05 2018 | 1:41 am
    Hello, I'm using filtergraph for controling biquad~ filter, and I would like to change with params the dB/oct changing with the following of the frequency. for example, with a HP at 300 Hz, in one octave I would like to have -10db/oct, in 600Hz -12dB, and in 1000Hz -14dB/oct. How I could extract the formula of the commands I have to sent to filtergraph~? For example if I would it to stay all time for all frecuencies at -36dB/oct, how could I get it?
    Thank you very much. I suppose that some mathematics issues I'm missing. Thank you very much for sharing your knowledge.

    • Apr 05 2018 | 3:34 am
      this way... not at all.
      to get a steepness of less than 12db/octave you would have to mix the filters output against the input signal. and to get more than 12db/oct you put several biquads in series. actually very simple...