# Exposing FMOD Channels in UE4 for UI Hooks

**URL:** <https://qa.fmod.com/t/exposing-fmod-channels-in-ue4-for-ui-hooks/12667>\
**Category:** Unreal Engine\
**Created:** [August 26, 2016, 7:30pm UTC](https://qa.fmod.com/t/exposing-fmod-channels-in-ue4-for-ui-hooks/12667 "2016-08-26T19:30:51Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![SonikSky](https://avatars.discourse-cdn.com/v4/letter/s/ee59a6/32.png) [@SonikSky](https://qa.fmod.com/u/SonikSky)\
**Post date:** [August 26, 2016, 7:30pm UTC](https://qa.fmod.com/t/exposing-fmod-channels-in-ue4-for-ui-hooks/12667/1 "2016-08-26T19:30:51Z")

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Hi, I’m trying to expose parameters and channels to UE4 using both FMOD Studio and UE4.

I’m wanting to make a hook for UI, so I can manually change the volume of my FMOD audio channels in UE4 in my game.

Also, Is there a way to run UE4 Sound Engine and channels through FMOD, so I can use FMOD as my final and only mixing source?

Thank you!

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**Author:** ![geoff](https://avatars.discourse-cdn.com/v4/letter/g/a3d4f5/32.png) [@geoff](https://qa.fmod.com/u/geoff)\
**Post date:** [August 30, 2016, 11:49pm UTC](https://qa.fmod.com/t/exposing-fmod-channels-in-ue4-for-ui-hooks/12667/2 "2016-08-30T23:49:16Z")

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Unfortuately UE4’s built in audio goes straight to the output API (e.g. XAudio, Wasapi, etc), so it can’t easily be piped into FMOD for control over the mixing.

Epic have a very distant long term plan to completely rewrite their audio system and use software mixing. If/When that is finished, then it would be possible. Until then, the inbuilt audio will be completely separate.

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**Author:** ![Paalo](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/paalo/32/616_2.png) [@Paalo](https://qa.fmod.com/u/Paalo)\
**Post date:** [September 6, 2016, 5:42pm UTC](https://qa.fmod.com/t/exposing-fmod-channels-in-ue4-for-ui-hooks/12667/3 "2016-09-06T17:42:54Z")

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If you just wanna add UI for changing audio levels (eg. Master, Music, SFX), then use the “Set Bus Fader Level”-node. Here’s a post where I asked on how it worked: [http://www.fmod.org/questions/question/how-does-the-bus-set-fader-level-node-work/](http://www.fmod.org/questions/question/how-does-the-bus-set-fader-level-node-work/)