This is either a true Chopin composition or there's some brilliant musician out there able to make compositions that sound like one.
A great execution too from Lang Lang.
obviously AI
It's funny now divisive Lang Lang is with classical people. The Reddit classical threads are full of people outraged that they had him play this and declare him the worst possible person in the world to debut a Chopin piece.
They also have to forge the found document, or be in cahoots with someone that can do it. And have access to surreptitiously insert it into the document collection it was found in.
Thank you! I tried looking for a link in the HTML source for the archive.is page but couldn't find it. Maybe I just wasn't looking hard enough...