I’ve made an issue on this at Steam Audio’s Github also https://github.com/ValveSoftware/steam-audio/issues/70:
"When using FMOD’s audio engine with Steam Audio in Unity it will initially work in the Editor but when loading a scene it will stop working, even when I reload the current scene. When using Unity’s audio engine with Steam Audio it will keep on working leading me to the conclusion that something is wrong with the FMOD implementation. Furthermore, if I Live-Connect with FMOD Studio and Bypass the Steam Audio Spatializer the sound will play normally.
I looked into the Steam Audio code for FMOD integration a little but couldn’t really find anything conclusive. The two ideas I have are that either something is wrong Steam Audio code for FMOD, or that FMOD somehow drops the plugin or connection when a scene closes down and the Steam Audio Manager is destroyed and then when a new scene with a Steam Audio Manager is loaded FMOD simply ignores it.
I have a test project to demonstrate the problem and can provide it if anyone is interested, with all the plugins etc its a bit big to upload here directly."
Thought I’d ask here as well for input on my latter suspicion, is there anyway you could force FMOD to reload plugins or something similar?
Forgot to mentions this at the Github issue but I’m running Win10 64-bit if that makes any difference.