Adobe Audition has a very interesting notch filter that have been very useful to me. It has the following parameters I want to recreate this same type of notch filter using another tool, e.g. SoX, but I can't understand how it works. I've tried to recreate it using their own "scientific equalizer", using a Butterworth filter with various cutoffs and orders, but could not match the notch filter result.

Adobe Audition has a very interesting notch filter that have been very useful to me. It has the following parameters

According to their documentation, the chosen frequency is the center frequency and the width is either a second, fourth or sixth order, depending on the "Notch Width" option selected.

I want to recreate this same type of notch filter using another tool, e.g. SoX, but I can't understand how it works. I've tried to recreate it using their own "scientific equalizer", using a Butterworth filter with various cutoffs and orders, but could not match the notch filter result.

How does this "Gain" parameter work? How can I reproduce this sort of filter with a traditional bandreject filter, like the one available in SoX?