# Randomisation on distinct events

**URL:** <https://qa.fmod.com/t/randomisation-on-distinct-events/21242>\
**Category:** FMOD Studio\
**Created:** [February 14, 2024, 1:27pm UTC](https://qa.fmod.com/t/randomisation-on-distinct-events/21242 "2024-02-14T13:27:03Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![trjaudio](https://avatars.discourse-cdn.com/v4/letter/t/ea666f/32.png) [@trjaudio](https://qa.fmod.com/u/trjaudio)\
**Post date:** [February 14, 2024, 1:27pm UTC](https://qa.fmod.com/t/randomisation-on-distinct-events/21242/1 "2024-02-14T13:27:03Z")

</div>

Hi.  
I have an event that has a probability of 50%.  
That event is being spawned on many different emitters in game.  
But they all stick to the same 50% so to speak. That means that once random probability of 50% has been met, they all play at the same time or they are all quiet at the same time.  
I want true random behavior per local instance. Not per global instance if that makes sense.  
How can I achieve this from the same event?

Thanks

---

<div class="post-metadata">

**Author:** ![joseph](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/joseph/32/264_2.png) [@joseph](https://qa.fmod.com/u/joseph)\
**Post date:** [February 15, 2024, 2:40am UTC](https://qa.fmod.com/t/randomisation-on-distinct-events/21242/2 "2024-02-15T02:40:39Z")

</div>

When I test here, each instance of an event checks its instruments’ probability trigger conditions separately and independently of earlier instances; if I play multiple instances of the same event, each containing an instrument with a 50% chance of playing, approximately half of them will play. This is the expected behavior, and can be readily demonstrated by creating a new scene in the sandbox window and dragging instances of the event into that scene one at a time.

I must be doing something differently to you. How exactly are you triggering instances of the event in your game? If you try dragging event instances into a sandbox scene as I described above, does the issue still reproduce? Are you able to post a screenshot showing the probability trigger condition of the relevant instrument?