I know he plays a number of instruments, but doubt that he has the formal training that might be required for admission.
The papers are usually not required, but some skills taught at music schools are. For studying instruments he will most probably have to:
-prepare some pieces at home and present them (the Academy will name several pieces to choose from)
-get some unknown notes and an hour or two to prepare another piece or set of pieces
-have an exam in a vista playing
So, if he can't play a vista, he can forget about it.
(By the way, I'd love to know the story behind your screen name, and what it means.)
There is a Romantic narrative poem by Mickiewicz called "Świtezianka", and Świtezianka is most probably the name of a kind of a deamon who lives in the lake of Świteź. Or it's also a species of dragonfly.