One of the best aspects of RO is the god-tier soundtrack. That said, the event maps used on Turn In quests only play the log-in music which, in my opinion, is the worst BGM of the game.
Please set the BGM of TI maps to that of the map it should be.
Actually, the rotating map system itself is done quite lazily. Most of time last month, the NPC said the high TI map was Comodo Dungeon, when it was Ice Dungeon. Those little details need to be tended to if the TI system is going to stay.