Eddie probably gives in and is like 'yeah sure' since he's like the most laid back teacher. Generally lets the students swap instruments, test everything out, etc. His motto is YOU'RE NOT TIED TO ONE PIECE OF SHIT INSTRUMENT YOU ENTIRE LIFE, LIVE A LITTLE.

Bertie gets away with playing JAZZZY shit since Eddie hates the usual band tunes that play for football games and music given to the school.