I am an instructor of digital signal processing, and I would like to show to my students that the “classic filters” implemented in Audacity (e.g., low pass Butterworth) correspond to some known discretizazion technique (such as the bilinear method) used to convert the filter’s transfer function from the s domain to the z domain.
How can I detect which specific filters’ parameters are used in Audacity ?
For example, how can I detect which digital filter corresponds to the low-pass Butterworth filter of a prescribed order and cutoff frequency ? This filter is accessible in the “Filters->Classic filters” menu of Audacity 2.3.0.
Thanks everyone in advance !