# Unity web build error "Cannot close a closed AudioContext" **URL:** \ **Category:** Unity\ **Tags:** unity\ **Created:** [May 26, 2026, 2:27pm UTC](https://qa.fmod.com/t/unity-web-build-error-cannot-close-a-closed-audiocontext/24284 "2026-05-26T14:27:32Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![pantsus](https://avatars.discourse-cdn.com/v4/letter/p/cdc98d/32.png) [@pantsus](https://qa.fmod.com/u/pantsus)\ **Post date:** [May 26, 2026, 2:27pm UTC](https://qa.fmod.com/t/unity-web-build-error-cannot-close-a-closed-audiocontext/24284/1 "2026-05-26T14:27:32Z")
Hello everyone! My unity build woking perfectly on Windows, but when i tying open web build in different browsers, it shows some error message on startup and sounds not works. RuntimeManager.CoreSystem.mixerResume() not helping too. Also tried to make empy scene and wwait 10 mins to let build load all banks, if this a problem, but it not helped too. Just for testing I created new project with some Event Reference and EventInstance, and it works in web build. I imported FMOD project form unity\_project\_with\_issues, and again all works in web… I appriciate any help with this problem… ![изображение_2026-05-26_164241149](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/d/d81b0934452d8b4d9587d22edade29f6ba83c925.png) ---
**Author:** ![Connor\_FMOD](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/connor_fmod/32/3685_2.png) [@Connor\_FMOD](https://qa.fmod.com/u/Connor_FMOD)\ **Post date:** [May 26, 2026, 11:57pm UTC](https://qa.fmod.com/t/unity-web-build-error-cannot-close-a-closed-audiocontext/24284/2 "2026-05-26T23:57:08Z")
Hi, Could I please grab your Unity and FMOD Integration versions? ---
**Author:** ![pantsus](https://avatars.discourse-cdn.com/v4/letter/p/cdc98d/32.png) [@pantsus](https://qa.fmod.com/u/pantsus)\ **Post date:** [May 27, 2026, 4:43am UTC](https://qa.fmod.com/t/unity-web-build-error-cannot-close-a-closed-audiocontext/24284/3 "2026-05-27T04:43:30Z")
FmodStudio 2.03.11 Unity 6000.3.2.f1 Integration version: 2.03.13 Integration Build Number: 162576 When I met this problem, i immedeately upgrated integration to last version, but it didnt helped) ![изображение_2026-05-27_114843593](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/8/801ffc76676840e60a0b106f39d273b4c3cb2290.png) Screen of Chrome console when i got error ![изображение_2026-05-27_141710739](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/e/e3d181135522b1ff99641a66b7eda89d2a353071.png) ---
**Author:** ![Connor\_FMOD](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/connor_fmod/32/3685_2.png) [@Connor\_FMOD](https://qa.fmod.com/u/Connor_FMOD)\ **Post date:** [May 27, 2026, 11:49pm UTC](https://qa.fmod.com/t/unity-web-build-error-cannot-close-a-closed-audiocontext/24284/4 "2026-05-27T23:49:57Z")
Thank you for the info and the images. With the following settings: ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/9/9e5d1f70f42eab6a2bee9dda0ed903429bcc1dec.png) Would it be possible to share the full player logs? We can see the first error `ERR_OUTPUT_CREATEBUFFER` which is causing the FMOD system to default to `no-sound mode`. So there may be other issues contributing to the uncaught error. We can see from the `FMOD Studio Debug` that the system is running however and there are channels playing. To resolve the FMOD warning you need to add an: [Unity Integration | Game Components - Studio Listener](https://fmod.com/docs/2.03/unity/game-components.html#studio-listener) to your Unity Scene. ---
**Author:** ![pantsus](https://avatars.discourse-cdn.com/v4/letter/p/cdc98d/32.png) [@pantsus](https://qa.fmod.com/u/pantsus)\ **Post date:** [May 28, 2026, 6:00am UTC](https://qa.fmod.com/t/unity-web-build-error-cannot-close-a-closed-audiocontext/24284/5 "2026-05-28T06:00:39Z")
I hope i captured what you asked… ![изображение_2026-05-28_085542975](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/7/711f54ccf17e015c2b7e76d2672d0f9de6ac4cf6.png) ![изображение_2026-05-28_085634021](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/b/baf21c89d55f8ce37c9f90556af2d86ac1f69fd1.png) ![изображение_2026-05-28_085823810](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/d/dc9b690d72b9a37e8decb21da7867cbbb772c752.png) ![изображение_2026-05-28_085746987](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/7/7ebe7fb02c815935f3b50278d1c086a939728f1d.png) ![изображение_2026-05-28_085906828](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/4/422610c27251e69783520dd0f6622f94daf096be.png) ![изображение_2026-05-28_085711665](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/9/99a346020a0b8d7afec1efbe4f855b572aedf9e1.png) ---
**Author:** ![pantsus](https://avatars.discourse-cdn.com/v4/letter/p/cdc98d/32.png) [@pantsus](https://qa.fmod.com/u/pantsus)\ **Post date:** [May 29, 2026, 3:01pm UTC](https://qa.fmod.com/t/unity-web-build-error-cannot-close-a-closed-audiocontext/24284/6 "2026-05-29T15:01:04Z")
Problem solved by copying all my project to the new Unity project. Just created new project, checked WEBGL + FMOD compatibility with just one sound, and when it worked copied all my assets and scripts and anything to this new FMODworking unityproject. I not changed versions, or anything. Same FMOD project, same banks, all same scripts. Just not adden Dotween to new project, as i not using it yet. IDK where problem was hiding, i tried load just one bank, or load no banks, at least this is not a bank loading issue… And settings like “build for all platforms” if FMOD Studio or different setting on UnityFmod integration not helped too, i checked them all. Thx for reaction anyway. ---
**Author:** ![Connor\_FMOD](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/connor_fmod/32/3685_2.png) [@Connor\_FMOD](https://qa.fmod.com/u/Connor_FMOD)\ **Post date:** [June 1, 2026, 2:01am UTC](https://qa.fmod.com/t/unity-web-build-error-cannot-close-a-closed-audiocontext/24284/7 "2026-06-01T02:01:54Z")
Thank you for sharing the logs and your solution.