# Can I play a Sound in a loop-region only the first time the loop is trigged?

**URL:** <https://qa.fmod.com/t/can-i-play-a-sound-in-a-loop-region-only-the-first-time-the-loop-is-trigged/18094>\
**Category:** FMOD Studio\
**Created:** [December 13, 2021, 12:11pm UTC](https://qa.fmod.com/t/can-i-play-a-sound-in-a-loop-region-only-the-first-time-the-loop-is-trigged/18094 "2021-12-13T12:11:41Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![herbeck](https://avatars.discourse-cdn.com/v4/letter/h/8c91f0/32.png) [@herbeck](https://qa.fmod.com/u/herbeck)\
**Post date:** [December 13, 2021, 12:11pm UTC](https://qa.fmod.com/t/can-i-play-a-sound-in-a-loop-region-only-the-first-time-the-loop-is-trigged/18094/1 "2021-12-13T12:11:41Z")

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Hello,

I’m wondering if it iy possible to trigger a sound in a loop region only once, if it plays for the first time.

I’m building a interactive music system and want some instruments from part A to play into part B, but only when part B loops for the first time.

I’m looking forward if anybody knows a solution, and I’m very thankful for your help

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**Author:** ![Alcibiade](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/alcibiade/32/4284_2.png) [@Alcibiade](https://qa.fmod.com/u/Alcibiade)\
**Post date:** [December 13, 2021, 1:07pm UTC](https://qa.fmod.com/t/can-i-play-a-sound-in-a-loop-region-only-the-first-time-the-loop-is-trigged/18094/2 "2021-12-13T13:07:11Z")

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It is possible by creating an async instrument (like a nested event), which fills the entire loop. That way, the instrument will only be triggered once.