# Async events, quantization and starting point

**URL:** <https://qa.fmod.com/t/async-events-quantization-and-starting-point/17731>\
**Category:** FMOD Studio\
**Tags:** ue4\
**Created:** [September 28, 2021, 11:37am UTC](https://qa.fmod.com/t/async-events-quantization-and-starting-point/17731 "2021-09-28T11:37:53Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**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:** [September 28, 2021, 11:42pm UTC](https://qa.fmod.com/t/async-events-quantization-and-starting-point/17731/3 "2021-09-28T23:42:59Z")

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As Alcibiade says, if you want an instrument to trigger only on a certain beat, you should quantize the instrument to trigger on beats, and reduce the size of its trigger region to only cover the specific beat you want it to be triggered on. This works because a trigger region represents the region of the parameter that can trigger the instrument, so shrinking the trigger region shrinks the number of timeline values at which it can be triggered.

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_[View the full topic](https://qa.fmod.com/t/async-events-quantization-and-starting-point/17731)._