I'm normally in the camp of "why flood HN with AI crap" and if you are not a musician then I can see why this seems unnecessary. But as a musician, this is a great learning tool. Every musician should be able to play by ear (and I had to ramp up the difficulty substantially to get a bit of a challenge). AI generated or not, this is useful.

Yeah I've been playing 40 years and did a stint in music school. Other than fat-fingered note entry errors my ear nailed all the ones I did. IMO this seems to start from a pretty advanced level off the bat.