Although not perfect, I'd like to introduce ToneTrace, a match eq which learns from the equalization of one recording, then learns that of another and applies the first curve to that. It also gives you 3 tones representing the level of confidence in the captures, a text description of what the matched curve does, and a tab that gives you the ability to adjust each of the graphic bands and hear its centre frequency, providing ear training while you work. https://github.com/dgl1984/tonetrace