Yes you can.
The sound engine I/O system is completely overridable / plug-in-able. Also, the implementation of the Stream Manager rests on a set of interfaces, referred to as the Low-Level IO, which you can implement the way you like, in order to redirect I/O to your own file I/O system.
You will find more information directly in the documentation of the SDK.
Note that it is also possible for games to use the sample streaming manager provided with the sound engine to manage all the game I/O.