I think the idea of miscalibration of matching isn't that the system can't ID classical, it's that the system doesn't know that classical should have different

I think the idea of miscalibration of matching isn't that the system can't ID classical, it's that the system doesn't know that classical should have different rules apply. A lot of pop music "sounds the same" but the songs are actually different in meaningful ways note-wise. When you're dealing with classical music it's all the same notes! Just different people playing it. So probably what's happening (some-how, some-way) is that the ID mechanism is trained to find songs that are "the same" and in pop music they're only "the same" if they're the _same song_. But in classical there are many songs that are different that are the _same song_ and so the model which was trained with one set of assumptions completely fails when a different set of assumptions are in play. And because classical doesn't register in a big way to the people in charge this doesn't get fixed because it only takes the algorithm from 99.85% accurate to 99.72% accurate which as we all know, is meaningless!