# Play sound but the instances can't be released

**URL:** https://qa.fmod.com/t/play-sound-but-the-instances-cant-be-released/14654
**Category:** Unity
**Created:** [May 8, 2019, 9:43am UTC](https://qa.fmod.com/t/play-sound-but-the-instances-cant-be-released/14654 "2019-05-08T09:43:00Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![kcWong](https://avatars.discourse-cdn.com/v4/letter/k/a5b964/32.png) [@kcWong](https://qa.fmod.com/u/kcWong)
#### Post date: [May 8, 2019, 9:43am UTC](https://qa.fmod.com/t/play-sound-but-the-instances-cant-be-released/14654/1 "2019-05-08T09:43:00Z")

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On iPhone, FMOD version is 1.10.06, a bgm is playing. When I play some other sound, the bgm may mute for a while. Trough the profiler, I found so many instances are playing, it may be the reason that cause this problem.

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/1X/c174c39bddcb1f00ea4f2aa55241246d808a3ef3.png)

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### Author: ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)
#### Post date: [May 14, 2019, 12:14am UTC](https://qa.fmod.com/t/play-sound-but-the-instances-cant-be-released/14654/2 "2019-05-14T00:14:18Z")

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I think this may be related to an issue that was fixed in 1.10.11, you will need to update to get the fix:

> - Studio API - Fixed fire and forget event instances not releasing when another instance of the same event is active.