GetParameterDescription called in Construction Script (Or OnConstruction in C++) returns empty array when running in a packaged build

Unreal Engine
1

Hi
I’ve been struggling with this for a while now.
The GetParameterDescriptions function in UFMODEvent is supposed to return an array of type FMOD_STUDIO_PARAMETER_DESCRIPTION.
I’m trying to get FMOD parameter names in the construction script. When I call GetParameterDescriptions in the construction script, it populates the array fine and the values stick when playing in the editor. However, when playing in Standalone or in a packaged build, the array comes out to be empty.

Is there something I’m missing here?

2

It looks like GetParameterDescriptions was not intended to be used outside of the editor, which is why it does not work in Standalone or a packaged build.

The issue is the EFMODSystemContext in this line of UFMODEvent::GetParameterDescriptions:

FMOD::Studio::EventDescription *EventDesc = IFMODStudioModule::Get().GetEventDescription(this, EFMODSystemContext::Auditioning);

The fix should be as simple as changing it to EFMODSystemContext::Max, this will then use a valid FMOD System at runtime.

I have added a task to implement this fix for an upcoming release.

3

Hi,
I am facing the same problem, I can’t get event parameter descriptions in packaged build, before I go ahead and modify the function from the plugin in my project, is this the only solution there is? is there a good reason for keeping the EFMODSystemContext as Auditioning?
I need the event parameter descriptions so I can check if an event accepts a specific parameter before trying to use SetParameter. If there is a good reason for hiding these descriptions in Packaged builds maybe I should find a different solution to my problem