# Possible stale Master Bank mixer metadata after switching Master Banks in Unity

**URL:** https://qa.fmod.com/t/possible-stale-master-bank-mixer-metadata-after-switching-master-banks-in-unity/24497
**Category:** FMOD Studio
**Created:** [September 3, 2026, 2:52am UTC](https://qa.fmod.com/t/possible-stale-master-bank-mixer-metadata-after-switching-master-banks-in-unity/24497 "2026-09-03T02:52:30Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![neonphaser](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/neonphaser/32/909_2.png) [@neonphaser](https://qa.fmod.com/u/neonphaser)
#### Post date: [September 3, 2026, 2:52am UTC](https://qa.fmod.com/t/possible-stale-master-bank-mixer-metadata-after-switching-master-banks-in-unity/24497/1 "2026-09-03T02:52:30Z")

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Hi,

We have a Unity/FM​​OD issue where mixer settings only apply correctly after connecting FMOD Studio Live Update.

Environment:

- Unity 6.3 LTS (6000.3.14f1)
- FMOD Studio 2.03.14
- FMOD for Unity 2.03.14

Steps / result:

1. Set the Music/BGM bus fader to -inf dB in FMOD Studio.
2. Build banks.
3. Run Unity without Live Update.

Expected:  
The BGM should be muted.

Actual:  
The BGM still plays. As soon as we connect Live Update, the BGM is immediately muted and the latest mixer routing/fader settings are applied.

Notes:

- FMOD Studio audition works correctly.
- Existing snapshot events work in Unity.
- The affected BGM does not use sends/returns.
- We previously used two Master Banks:
  - resources.bank: temporary Master Bank for pre-patch/download-screen audio.
  - master.bank: main Master Bank loaded after patching.

- We changed resources.bank to a normal bank and left only master.bank as the Master Bank, but the problem remains.
- Patch-screen BGM also ignores the saved BGM VCA mute setting, while main-game BGM respects the same setting after entering the game.

Could switching between temporary and main Master Banks in the same FMOD Studio System cause stale mixer/routing/VCA metadata? Is a single Master Bank for the full application lifetime the recommended setup?

Thank you.

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<div class="post-metadata">

### Author: ![Connor\_FMOD](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/connor_fmod/32/3685_2.png) [@Connor\_FMOD](https://qa.fmod.com/u/Connor_FMOD)
#### Post date: [September 7, 2026, 4:04am UTC](https://qa.fmod.com/t/possible-stale-master-bank-mixer-metadata-after-switching-master-banks-in-unity/24497/2 "2026-09-07T04:04:42Z")

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Hi,

Thank you for bringing this to our attention. Just to confirm you are seeing the refresh bank pop up after building banks in studio?

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/b/b36d78dc8f8455f700d50ec2fe38d90f1d52309b.png)

How are you changing the master bank during runtime? Have you changed the integrations `Load Banks` setting?

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/b/bfcd157e03773e58c3e4f7263c56f3162a7328e8.png)

> [@neonphaser](#):
>
> Could switching between temporary and main Master Banks in the same FMOD Studio System cause stale mixer/routing/VCA metadata?

Having multiple master banks is fine as long as:  
“If you want to load multiple master banks simultaneously, each master bank must have a different GUID. A newly created master bank has a unique GUID by default, but a new version of an existing master bank does not.” ([FMOD Studio | Supporting Downloadable And User Generated Content - Creating DLC](https://fmod.com/docs/2.03/studio/supporting-downloadable-and-user-generated-content.html#creating-dlc)). However, the Unity integration may need some additional configuration for supporting multiple master banks. For example, you need to make sure the master bank loaded by the integration first is the one with the updated mixer configurations.

> [@neonphaser](#):
>
> Is a single Master Bank for the full application lifetime the recommended setup?

Multiple master banks is normally used for DLC or UGC rather than loading scenes.