# Multiplayer global parameter

**URL:** <https://qa.fmod.com/t/multiplayer-global-parameter/22559>\
**Category:** Unreal Engine\
**Created:** [January 31, 2025, 2:15pm UTC](https://qa.fmod.com/t/multiplayer-global-parameter/22559 "2025-01-31T14:15:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Mitsuhige](https://avatars.discourse-cdn.com/v4/letter/m/e36b37/32.png) [@Mitsuhige](https://qa.fmod.com/u/Mitsuhige)\
**Post date:** [January 31, 2025, 2:15pm UTC](https://qa.fmod.com/t/multiplayer-global-parameter/22559/1 "2025-01-31T14:15:38Z")

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Hello !

I need to know how the global parameter works in a multiplayer game. First of all, I only use Unreal Engine in blueprint because I have no knowledge of C++.

I’m using a global parameter to find out what type of room a player is in and I’d like to modify each reverb parameter according to the type of room.

So I’d like to know if each player has their own FMOD instance and therefore each has their own global parameter or is the global parameter the same (and therefore shared) between each player?

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**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:** [February 3, 2025, 4:01am UTC](https://qa.fmod.com/t/multiplayer-global-parameter/22559/2 "2025-02-03T04:01:27Z")

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Hi,

> [@Mitsuhige](#):
>
> I only use Unreal Engine in blueprint because I have no knowledge of C++.

There are known issues with using Blueprint only projects: [Unreal Integration | Troubleshooting - Blueprint only projects](https://fmod.com/docs/2.02/unreal/troubleshooting.html#blueprint-only-projects). You can add an empty C++ class through the `Tools` menu:

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/b/bb111e4d415177bec4b3d08388865c47daa7eaf3.png)

> [@Mitsuhige](#):
>
> So I’d like to know if each player has their own FMOD instance and therefore each has their own global parameter or is the global parameter the same (and therefore shared) between each player?

By default, each player will have their own FMOD system and variables. So their `Global` variables will only be global to their system.