Audio volume priority does not work

Unreal Engine
1

Has anyone tried to follow the instruction here on how to implement reverb zone in UE4? https://www.fmod.com/resources/documentation-ue4?version=2.0&page=user-guide.html#reverb-zones
I follow everything it said there, but when I have 2 audio volume overlap upon each other with priority 1 for the smallest one and priority 0 for the bigger one, it still plays the reverb snapshot of the bigger one despite I have fully emerged the character in the smaller volume. I tried to change the priority value around and it still happens.

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Did I do anything wrong? What could be the problem here? I try to use the same setup but with Unreal Reverb setting and it still works fine so I assume it is not the engine’s fault.

2

I am able to get it working as expected by following those steps, I’m not sure why it wouldn’t be working.

What version of FMOD and UE4 are you using?

3

I was using unreal 4.21 and FMOD1.10, I’m not sure where did I do wrong cause apparently the reverb does play, but only the priority of the audio volume doesn’t work.

4

Are you able to test it in a new/empty project to try to isolate it?

5

I tried to test it in a blank project and apparently it also have the same issue. I put a youtube link down there to show my set-up. I have done this same thing with Reverbs and sounds from UE audio, they work just fine as expected. https://youtu.be/qhi4dIU5kf0

6

I managed to reproduce the issue, it appears that we don’t update the listener volume separately to the InteriorSettings (eg. Ambient Zone Settings).

This should be a fairly easy fix, we just need to update the volume used in FMODListener.cpp more often.

From:

void FFMODListener::ApplyInteriorSettings(class AAudioVolume *InVolume, const FInteriorSettings &Settings)
{
    if (InteriorSettings != Settings)
    {
        ...
        Volume = InVolume;
        InteriorSettings = Settings;
    }    
}

To:

void FFMODListener::ApplyInteriorSettings(class AAudioVolume *InVolume, const FInteriorSettings &Settings)
{
    if (InteriorSettings != Settings)
    {
        ...
        InteriorSettings = Settings;
    }
    Volume = InVolume;
}

Because the InVolume is always the highest priority volume enveloping the listener, we don’t need to check the priority again.

I will do my best to get this fix in for the upcoming release.

7

Thanks Cameron!
Our programmer has applied the fix to the project and everything work as it suppose to now

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