If the people playing with the candidate were also the panel and were all wearing blindfolds facing the candidate, who is facing them, maybe they would be able to discern the direction from which the sound is coming from? I don’t know, maybe it’s too silly. Or if the chamber music round is for the candidate’s instrument plus instruments from different groups, like clarinet plus viola and piano, flute plus violin, viola, cello, then the screen can still be up