It would be greatly appreciated if the usage of the python package scipy's filter (e.g. butter) analog=True argument could be explained. I don't understand what is meant by this (any signal being processed by scipy in python on a computer is discrete and will always be digital?). I an pretty familiar with DSP but have little knowledge of analog signals.
This seems like a simple question, but I have scoured the docs and online forums and not found anything addressing this directly, apologies if I have missed something!