Directly (or not?) related to this post: http://www.fmod.org/questions/question/warnings-when-building-project-with-ue-4-13-and-1-08-11/
I am using UE 4.13.0 and FMOD plugin for UE4. While I can hear sound in the Editor(PIE), there is no sound on the device (Gear VR).
Using FMOD .so and .dlls from Audio SDK Plugins 1.04 from Oculus with FMOD version 1.08.11 plugins from FMOD.