The TED talk was great, though he could have used more compelling examples than George Harrison and Sam Smith. Also great was Damien's Twitter response to the author on using the de Brujin approach-

We had initially considered a “de Bruijn” sequence. But if we were to use a single file, that would have down sides:

If someone infringes our work, it would only be a tiny percentage (0.0000000001%?) of the “work” — so someone would argue “fair use”

Same idea with others incorporating ATM works in theirs (“tiny percentage”)

So our technical/legal design is “One MIDI file per melody” — which I think is a legal feature, not a bug.