# Sound plays double

**URL:** https://qa.fmod.com/t/sound-plays-double/15902
**Category:** FMOD Studio
**Tags:** unity
**Created:** [June 19, 2020, 7:38am UTC](https://qa.fmod.com/t/sound-plays-double/15902 "2020-06-19T07:38:53Z")
**Posts on this page:** 4
**Page:** 1

<div class="post-metadata">

### Author: ![dr\_tolle](https://avatars.discourse-cdn.com/v4/letter/d/7ea924/32.png) [@dr\_tolle](https://qa.fmod.com/u/dr_tolle)
#### Post date: [June 19, 2020, 7:38am UTC](https://qa.fmod.com/t/sound-plays-double/15902/1 "2020-06-19T07:38:53Z")

</div>

![Screenshot_2](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/e/e769c8bb582748d841f1368c2fc013306585e83e.jpeg)

I have setup a simple engine sound. When I move the RPM parameter up and down changing between the different clips it often happens that the sounds plays double.  
it can be seen in a screen recording I have uploaded here.

> **[Dropbox - File Deleted](https://www.dropbox.com/sh/9iq14y4pggvi75m/AAB79bBjiH9KsAslcd7nW9Uoa?dl=0)**
>
> Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Never email yourself a file again!

When looking at other videos it doesnt seem to happen. eg :

[![](https://img.youtube.com/vi/UV0mVnwLqZ8/maxresdefault.jpg "Adaptive Engines in FMOD Demo - Part 2") ](https://www.youtube.com/watch?v=UV0mVnwLqZ8)

Any ideas ?

Thomas

---

<div class="post-metadata">

### Author: ![dr\_tolle](https://avatars.discourse-cdn.com/v4/letter/d/7ea924/32.png) [@dr\_tolle](https://qa.fmod.com/u/dr_tolle)
#### Post date: [June 22, 2020, 2:46am UTC](https://qa.fmod.com/t/sound-plays-double/15902/2 "2020-06-22T02:46:02Z")

</div>

does nobody have any ideas ??

Tell me if I haven’t explained the problem properly.

---

<div class="post-metadata">

### Author: ![richard\_simms](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/richard_simms/32/261_2.png) [@richard\_simms](https://qa.fmod.com/u/richard_simms)
#### Post date: [June 23, 2020, 2:27am UTC](https://qa.fmod.com/t/sound-plays-double/15902/3 "2020-06-23T02:27:52Z")

</div>

You need to enable “Cut” on the instruments so that once the parameter value falls outside the instrument’s trigger region, the instrument is stopped. You can also adjust the polyphony to 1 voice so that retriggering the instrument does not cause multiple instances of the instrument to play at once.

---

<div class="post-metadata">

### Author: ![dr\_tolle](https://avatars.discourse-cdn.com/v4/letter/d/7ea924/32.png) [@dr\_tolle](https://qa.fmod.com/u/dr_tolle)
#### Post date: [June 23, 2020, 8:05am UTC](https://qa.fmod.com/t/sound-plays-double/15902/4 "2020-06-23T08:05:53Z")

</div>

Thanks a million.! Couldn’t find the polyphony parameter but ‘cut’ did the trick !

Thomas 🙂