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Nested rooms creates sudden transitions - Spatial Audio

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Happy new year! I have a question on the behavior of my nested spatial audio volume.

 

I have 3 "rooms" needs volume treatment: An Outdoor, an Indoor, and a nested Indoor with an open ceiling which I want to connect to Outdoor (exactly like a chimney in a house situation, but a very fat chimney).

 

Because of the map, Portal connecting Outdoor and Indoor is very close to Portal connecting Indoor and Chimney, they are positioned in a line.

 

The problem occurs when transitioning from Indoor to Chimney:

 

if I set Chimney as AkReverbZone, and child of Outdoor, There will have no transition of Outdoor roomtone(from Indoor to Chimney), roomtone plays full volume as soon as I enter Chimney.

if I set Chimney as AkSpatialAudioVolume, with 2 portals, each connecting the bottom opening(to Indoor) and the ceiling(to Outdoor), and set Chimney priority higher then Indoor, it does not work. But only if I disable the ceiling surface of Indoor, that will make Chimney work.

if I set Chimney as AkSpatialAudioVolume, and using modeling tool to carve out the Indoor Volume, it works without having to disable ceiling surface.

 

But, all results creates sudden transition when I step into Indoor, the map is causing portals that they have to be close to each other.

 

In my settings, priority is always: Outdoor 0.0, Indoor 1.0, Chimney 2.0.

The situation I'm discribing only have one sound playing which is the roomtone of Outdoor.

Unreal 5.3.2

Wwise 2023.1.9

 

So, are there any way that I can tweak the settings? priorities? change set up of portals and volumes? to get a smooth transition when two portals of the three volumes that are very close to each other.

 

Thank you for your time and help.

 

A quick screen grab of the transition: 

https://youtu.be/6tPYIJqgWHY
Youtube compressed the audio channel, so please just focus on the 3D viewer

in General Discussion by Dan Wang (100 points)

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