During (right at the beginning, actually) the fight against Geralt in front of the flaming house, you can hear Olgierd von Everec saying: Let the music play on! (Graj, muzyko, graj in Polish or Играй, музыка! Играй in Russian). It's a quote of Leo Bonhart, Ciri's biggest enemy from books. He used to say it every time he started to fight.