# Pan Override Mix knob automation not working as expected

**URL:** <https://qa.fmod.com/t/pan-override-mix-knob-automation-not-working-as-expected/15029>\
**Category:** Unreal Engine\
**Created:** [September 5, 2019, 11:23pm UTC](https://qa.fmod.com/t/pan-override-mix-knob-automation-not-working-as-expected/15029 "2019-09-05T23:23:31Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![NPaladino](https://avatars.discourse-cdn.com/v4/letter/n/49beb7/32.png) [@NPaladino](https://qa.fmod.com/u/NPaladino)\
**Post date:** [September 5, 2019, 11:23pm UTC](https://qa.fmod.com/t/pan-override-mix-knob-automation-not-working-as-expected/15029/1 "2019-09-05T23:23:31Z")

</div>

Hi all,

I have a sound with a parameter called ‘3D’, that controls the Mix knob of the Pan Override on the Spatializer plugin. When the parmeter is false/0, the mix is 100%, and when the parameter is true/1, the mix is 0%. This is my way of making an event play in 3D or not (which is a requirement).

This works like a charm in FMOD studio, but when I go to Unreal, setting this parameter doesn’t seem to do anything. I know for sure because I set the spatialization of the pan override to hard right and it still played center. When I set the overall panning (in the bottom right) to far right, it plays far right, so I know in principle the stereo-ness works, it just seems like automating the mix knob is failing.

This is the code I’m using to set the parameter:

AC-\>SetParameter(FName(“3D”), 0.f);

The parameter “3D” is a named parameter with two values, true/1 and false/0.

The listener has no override, although in principle that shouldn’t matter if the pan is being overriden… right? Am I missing something (or is there a simpler way to set the 3D-ness of an audio component’s event)?

---

<div class="post-metadata">

**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:** [September 6, 2019, 3:40am UTC](https://qa.fmod.com/t/pan-override-mix-knob-automation-not-working-as-expected/15029/2 "2019-09-06T03:40:13Z")

</div>

I’m afraid we don’t have enough information about your game to say why this is happening.

It might be worth double-checking that you’re setting the parameter value for the correct event and event instance. It might also be worth checking that setting the parameters of other events works correctly.

---

<div class="post-metadata">

**Author:** ![NPaladino](https://avatars.discourse-cdn.com/v4/letter/n/49beb7/32.png) [@NPaladino](https://qa.fmod.com/u/NPaladino)\
**Post date:** [September 6, 2019, 11:12pm UTC](https://qa.fmod.com/t/pan-override-mix-knob-automation-not-working-as-expected/15029/3 "2019-09-06T23:12:08Z")

</div>

Well, I was writing out a more detailed thing about what exactly I was doing, but while doing so, I figured it out! For anyone else who happens to have the exact set of circumstances I did, if you set the parameter before the audio component has an event, the parameter doesn’t then get applied once the audio component gets an event. I moved my parameter setting to once the audio component has an event and it works fine now. That also explains why my other parameters were working; my 3D parameter is a set it an forget it, so it was at the beginning, while the others were constantly being changed after it had an event.

Thanks Joseph!