# Understanding the effect of reverbocclusion

**URL:** <https://qa.fmod.com/t/understanding-the-effect-of-reverbocclusion/19617>\
**Category:** FMOD Engine\
**Created:** [December 5, 2022, 8:50pm UTC](https://qa.fmod.com/t/understanding-the-effect-of-reverbocclusion/19617 "2022-12-05T20:50:47Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![strictfp](https://avatars.discourse-cdn.com/v4/letter/s/f475e1/32.png) [@strictfp](https://qa.fmod.com/u/strictfp)\
**Post date:** [December 12, 2022, 7:27pm UTC](https://qa.fmod.com/t/understanding-the-effect-of-reverbocclusion/19617/8 "2022-12-12T19:27:19Z")

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Hi Leah,

> [@](#):
>
> It is by design, yes. I believe the occlusion DSP chain used to run parallel signal chains to support separate occlusion of reverb, but was changed to run in series some time ago in the transition to FMOD Studio.

I see, thank you. Is this something you would consider for a feature request? I found one [other possible mention of the problem on the forum](https://qa.fmod.com/t/occlusion-with-fmod-studio/13082/3), not sure if that matters or not. But I report my interest if it’s possible to request 😃

> [@](#):
>
> From my testing everything seems to work as you want it to, but depending on how you’re handling your reverb, and whether you have multiple sounds running into that reverb, and you may run into more problems that require further manual changes to DSP connections.

That sounds very promising. Thank you very much for putting in the time to suggest this and testing it out! I take it you can use the core APIs to construct such a chain, i.e basically following the structure of [the white paper](https://www.fmod.com/docs/2.02/api/white-papers-dsp-architecture.html)? And then I can use the profiler to observe the result? I will give it a shot. From the image it looks like you can have multiple WaveTable Units in the same graph, does that mean that I don’t necessarily need to play the sound twice, but can send it down two parallel paths in the same graph from one “play” call?

Thank you again for your time.

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