I could recommend and easier solution: play your own music while you play the game. Sure its a "stirring stick & duct tape" solution but imo its far less of a hassle than asking for features that take alot of work to implement with minimal returns. If its possible at all.

Try playing the game with music from different RPG's in fitting situations. Like persona 5's Life Will Change during Praetorium. Or the airwolf theme while flying the falcon. Its quite entertaining.