The single largest mod for Age of Empires II HD. Made specifically for The African Kingdoms. Other versions may or may not be supported.
This is a sample of music used in Age of Bloodshed. Credit goes to Mechwarrior 4: Mercenaries and the corresponding soundtrack. To use, copy to your C:\Games\Age of Empires II HD The African Kingdoms\resources\_common\sound\music folder. It will play in a random order with the rest of the songs.