Audio Reverb Zone makes even 0 volume clips audible

Unity Engine
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1

I have a ZERO VOLUME audiosource and it’s being affected by a reverb zone.
I hear extraneous sounds all over my project after upgrading to Unity 6.
Everywhere.

So I spent so long debugging it.
You’re welcome Unity. I hate this.

Using Audio Reverb Zone causes audio system to malfunction and play extraneous reverb sounds, even for sounds that aren’t audible.

Check out this bug.

ReverbZoneBug.zip (250.7 KB)

Open “REVERB-BUG-REPRO-SCENE.unity”
There are 2 disabled audio source gameobjects in the scene.

“1-Pop”
“2-Foostep” - set to Volume 0.

REPRO STEPS:
Ensure your Sound is on

  1. Play the scene
  2. Activate gameobject “1-Pop” and you will hear a sound.
  3. Activate “2-Footstep” and you will hear a deep reverb sound.
  4. Observe bug. Footstep is set to 0 volume. It should not contribute to reverb.

Perhaps associated with this previous bug:

I’ve filed a Bug report already.
CASE IN-92847

2

I’m also on the latest Unity 6000.33 LTS.

Oh and there’s no workaround at all, unless you just don’t want reverb. Or downgrade to a (slightly more stable) version of Unity.

3

would it possible to set-up reverb zones via a third party implementation software such as FMOD? i’ve done it myself but i don’t know if that’s what your looking for

4

Thanks for the suggestion, but that has nothing to do with this.
This is a new bug with Unity’s built in audio system.

Third party implementation software has nothing to do with the built in audio system.

1 Like
5

Thanks for the report @sameng at first glance it does seem like a regression from the previous bug fix you linked. I’ll try and fast track this one along to us in the audio team so we can look at it asap.

1 Like
6

Hi,

Thanks for the excellent description and the easy reproduction. We’ve identified the change that caused this issue - it wasn’t the linked bug but rather an internal change.

It should be fixed soon enough, sorry for the grief it caused you; automated measures will catch this going forward.

Best regards, Janus

1 Like
7

Fix has been made, meanwhile workaround is either not using ADPCM clips or changing the load type to not be “compressed in memory”.

2 Likes
8

Cheers, thank you for taking a look at this and the prompt reply and fix.
I appreciate it, looking forward to getting the update.