Easiest way to disable FMOD for debugging?

Unreal Engine
1

When we try to debug something, a lot of the times I feel it would be super helpful to be able to disable FMOD-> check if the problem still happens → determine if it is an audio issue. What would be the best way to do so?

2

Hi,

To clarify, do you want to disable the integration’s FMOD system, disable the entire plugin, or simply set it to output no sound?

3

Disable the integration’s FMOD system. Ideally we want to have a setting so that no FMOD update happens under this mode.

4

The easiest way to do this would be to modify two lines in ./FMODStudio/Source/FMODStudio/Private/FMODStudioModule.cpp:

  • Edit line 246 to always return false, so that FMOD is never “using sound”: virtual bool UseSound() override { return false; }
  • Comment out line 575, so that FMOD always returns before creating a system: //if (!bUseSound)

This essentially achieves the same outcome as running the project as a dedicated server - the FMOD Studio system is never created in the first place. I’ve taken the liberty of adding this to our internal feature/improvement tracker as well, as while it is a simple change, changing these lines each time you want to test your game without an FMOD system running is a bit unwieldy.

If you run into any issues, feel free to let me know.

5

Thank you!! What is line 575 ? We have some small edits here and there in the file so it might not match the original FMODStudioModule.cpp

Edit: nvm got it!

Thanks!

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6

Line 575 is the second line of FFMODStudioModule::CreateStudioSystem, and comes just after DestroyStudioSystem(Type); Here’s a code snippet:

void FFMODStudioModule::CreateStudioSystem(EFMODSystemContext::Type Type)
{
    DestroyStudioSystem(Type);
    if (!bUseSound)    // <- comment out this check, so the function always hits return
    {
        return;
    }

    UE_LOG(LogFMOD, Verbose, TEXT("CreateStudioSystem for context %s"), FMODSystemContextNames[Type]);

    // rest of the function below here...
}
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