Encore does not know everything, and it says so. It knows the public
domain classical repertoire well, and it learns the rest from the people
who use it.
When it draws a blank, your recording becomes a page anyone can answer.
Someone names it, you get told, and from then on the app answers that piece
instantly — for everyone.
The promise is not an instant answer every time. It is: ask, and
you get an answer.