I think the key difference is that playing go is about winning (at least, presumably that's what the AI is optimized for). Music is not. (I also agree with oth

I think the key difference is that playing go is about winning (at least, presumably that's what the AI is optimized for). Music is not. (I also agree with others in this thread that the popular commitment to equal temperament is exaggerated -- it's not all that uncommon to hear good musicians of various styles playing/singing/synthesizing "out of tune" music for various effects).