Within C:\Program Files (x86)\Deep Silver\Sacred 2 - Fallen Angel\scripts\client is a script called soundprofile.txt. It is possible within that file to edit the sounds connected to a Character Type. Remember to take a backup of the original file before you begin making any changes.
Example:
Within the Hero Dragon Mage section are entries referring to the music which plays when he is in battle. The important thing to note is the Resource = number
event526 = { event = "MUSIC_FIGHT_EA