Just got a response:
Thanks for asking!
[Unity 5.4] - We've moved up to Unity 5.4, plus we are using Wwise engine for Pillars II - not sure if that has to work in conjunction with FMOD.
Ah, okay, Wwise. Hmmkay.
As for the second part of that sentence: no, it does not. Wwise does exactly the same conceptually as FMOD (they're direct competitors), they usually don't have to work in conjuction. Or rather, it usally even makes no sense whatsoever to use both of them.
Going for the common car analogy: think of one as a diesel engine, one as a gasoline engine. They both do the same thing, burning fuel to provide motion (*). There's some subtle differences, but unless you build a car (and ignoring filling up the tank), you don't need to know about it. Both are valid options. And it usually makes no sense to have a car with both engines.
(*) Or in this case, providing audio with some light scripting capabilities and filter chains. Multiple sounds are grouped in banks that can be loaded/unloaded as a group, there's "events" that play a number of sounds, with effects applied and states that can change what is done on which event. Both FMOD and Wwise do that, as far as I know.
Let's just hope that the Linux version of Wwise isn't as bad as FMOD. Middleware is commonly a sore point for porting, with uncommon official ports of middleware often rather bad and buggy.
Edited by TheRealDrMcCoy, 29 January 2017 - 03:03 PM.