# How to reduce volume of all events while playing any vocal?

**URL:** <https://qa.fmod.com/t/how-to-reduce-volume-of-all-events-while-playing-any-vocal/12221>\
**Category:** FMOD Studio\
**Created:** [January 1, 2016, 10:18am UTC](https://qa.fmod.com/t/how-to-reduce-volume-of-all-events-while-playing-any-vocal/12221 "2016-01-01T10:18:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ahmadi](https://avatars.discourse-cdn.com/v4/letter/a/48db29/32.png) [@Ahmadi](https://qa.fmod.com/u/Ahmadi)\
**Post date:** [January 1, 2016, 10:18am UTC](https://qa.fmod.com/t/how-to-reduce-volume-of-all-events-while-playing-any-vocal/12221/1 "2016-01-01T10:18:36Z")

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Hi  
I have too many sound/music events.  
But when a vocal is playing , all of other playing events volume must reduced to 70% or less. How can i do that?!

I have 3 VCA in my project.  
Music VCA  
Effect VCA  
Vocal VCA

In other words, i want when an event that assigned to Vocal VCA is playing, other VCA volumes reduce to 70%.

Is it any prebuild facilities for doing that in FMOD Studio? or maybe i need to handle it by API programing.

Thank you for any help  
H.Ahmadi

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**Author:** ![brett](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/brett/32/261_2.png) [@brett](https://qa.fmod.com/u/brett)\
**Post date:** [January 2, 2016, 11:38am UTC](https://qa.fmod.com/t/how-to-reduce-volume-of-all-events-while-playing-any-vocal/12221/2 "2016-01-02T11:38:03Z")

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You might want to automate your vca volume with a sidechain.  
See this video for more on sidechains [https://www.youtube.com/watch?v=C\_smYg1vphc](https://www.youtube.com/watch?v=C_smYg1vphc)