# Timeline Marker Event Tirgger Delay
**URL:** https://qa.fmod.com/t/timeline-marker-event-tirgger-delay/14201
**Category:** Unreal Engine
**Created:** [November 20, 2018, 2:33pm UTC](https://qa.fmod.com/t/timeline-marker-event-tirgger-delay/14201 "2018-11-20T14:33:39Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Ashgard](https://qa.fmod.com/u/Ashgard)
#### Post date: [November 20, 2018, 2:33pm UTC](https://qa.fmod.com/t/timeline-marker-event-tirgger-delay/14201/1 "2018-11-20T14:33:39Z")
Hi,
It got me curious the way the callbacks work in UE4. In the project I’m working on I have some events that have timeline markers so I can start certain actions when the playback hits that marker. The thing is that when the changes are inside the event it works perfectly but when I use it to trigger another event inside UE4 there’s a delay in the playback of the new event. Is it supposed to work that way? Because event B (to name the new event) is supposed the start right away at the spot event A has the marker on.
My work around for this was to drive back half measure the marker so event B could start at a proper time, but I don’t know what which may be the issue or if it is something from the FMOD - UE4 connection, I don’t know if it is a known issue.
I’ll appreciate the info you guys can provide about it
---
### Author:  [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)
#### Post date: [November 23, 2018, 6:18am UTC](https://qa.fmod.com/t/timeline-marker-event-tirgger-delay/14201/2 "2018-11-23T06:18:43Z")
One way to improve the startup time of events is to make sure either the [Bank](https://www.fmod.com/resources/documentation-api?page=content/generated/FMOD_Studio_Bank_LoadSampleData.html#/) or [Event Description](https://www.fmod.com/resources/documentation-api?page=content/generated/FMOD_Studio_EventDescription_LoadSampleData.html#/) have had their sample data loaded.
Also there have been some changes made to the integration in the more recent versions of 1.10 that will help reducing any delays.