Has anyone written digital filters to approximate the sound of vinyl or tube amplifiers? Clearly from a digital processing standpoint, it would be fairly straightforward to add distortion and the roll offs that would appear to result in the characteristically warm sounds of analogue. I not sure...

I guess there are two cliques who post here. There are those that believe that audio can (and should) be quantitatively reviewed and those that think that only what they hear is relevant. I have no interest in hearing a rehash of this discussion. I am only writing to the former group who think...