Real Time Parameter Control (RTPC) can also be leveraged to provide dynamic mixing opportunities using parameters from the game to drive volume changes throughout the project. A common parameter driven mix technique is to apply a low pass filter to the in-game environmental mix as the player's health decreases. This can easily be accomplished with a health game parameter used as an RTPC on one or many audio busses.
Remember that Danger game parameter we created in order to increase the intensity for the horizontal music system? The same game parameter could be used to reduce the volume of sounds or audio busses that demand less attention during combat. Things like ambience or character movement sounds could have an RTPC curve applied to reduce their volume in the mix and make way for the sounds of combat.
Having multiple ways to interact with the different aspects of the mix means that when difficulties arise there will be several ways to approach a solution. Mixing with RTPC is another effective tool in the toolbox of interactive and dynamic mixing.