Gamasutra have a piece from Oleksa Lozowchuk, music director for Capcom, wherein he gives a breakdown of what went in to creating the soundtrack for Dead Rising 3.
To further support the tension of survival horror, we built a simple yet effective adaptive music system to feedback zombie threat to the user throughout the world … That being said, constant tension can wear down the user, so we provided some ear candy and reprieve from the chaotic wall of sound via diegetic music (world based) scattered throughout all 4 districts. As a player enters a location with memorable source music, the adaptive threat score recedes, temporarily giving the user a sense of relief from the hordes of zombies.
Definitely worth a read. Also, it’s nice to encounter a fellow comma-abuser once in a while.