Offhand, I would have thought that would be limited more to knowledge about audio signal processing and what-not, than the actual machine learning itself. I mean, yeah, you can get REALLY deep in the weeds with neural networks, but you can do an awful lot without doing so. If you ever feel like writing about this, I think a lot of people might find value in a blog post from you about what challenges you ran into and what you found out so far. I know I would.