# Effected Channels for SideChain

**URL:** <https://qa.fmod.com/t/effected-channels-for-sidechain/17003>\
**Category:** FMOD Studio\
**Created:** [April 8, 2021, 10:44am UTC](https://qa.fmod.com/t/effected-channels-for-sidechain/17003 "2021-04-08T10:44:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![dsfishlabs](https://avatars.discourse-cdn.com/v4/letter/d/ac8455/32.png) [@dsfishlabs](https://qa.fmod.com/u/dsfishlabs)\
**Post date:** [April 8, 2021, 10:44am UTC](https://qa.fmod.com/t/effected-channels-for-sidechain/17003/1 "2021-04-08T10:44:13Z")

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Hey Friends,

I do not know if this is still an issue in newer versions, so maybe this is already fixed or updated. If so, consider this to be outdated please 🙂 I am using Fmod 2.00.07.

When using a sidechain on a Bus I can either route that into a Compressor or into the Volume Knob Modulation.  
For Compressor i can deselect “Link” to unlink all affected channels and only duck the channels on which audio is played. With this I can avoid e.g. ducking the rear speakers even so i only play voice on the center speaker.  
I can not unlink the channels for the Volume Knob Modulation! Actually I would expect this to be the default behaviour…

Thanks so much 🙂  
Best  
Phil

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**Author:** ![joseph](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/joseph/32/264_2.png) [@joseph](https://qa.fmod.com/u/joseph)\
**Post date:** [April 21, 2021, 1:30am UTC](https://qa.fmod.com/t/effected-channels-for-sidechain/17003/2 "2021-04-21T01:30:57Z")

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Thanks for the suggestion. I’ve added it to our feature/improvement tracker.

The reason why it’s not possible currently is that most properties have only a single value for a modulator to affect. Modulating track or bus volume is a special case that will require additional code for us to support.