It might have been a mere coincidence, but playing the music of the Four-Eared tribe indeed had a substantial impact on the residents of the Fire Tribe.
All twenty of the Fire King's ministers had been executed for committing war crimes and slaughtering tens of thousands of slaves during the war, some of whom belonged to intelligent species.
To the Fire Tribe, all members of intelligent species were slaves; to the intelligent species, the Fire Tribe were monsters.
The Fire Tribe itself had a population of six billion, and their slaves numbered five billion. Most of the slaves had now been accepted by the Grand Alliance and had become legitimate citizens.
The topic of greatest interest currently was how to reform the residents of the Fire Tribe so that they could communicate with intelligent species instead of continuing to look monstrous.