# Unity PlayOneShot with a specific volume?

**URL:** <https://qa.fmod.com/t/unity-playoneshot-with-a-specific-volume/15370>\
**Category:** Unity\
**Created:** [January 9, 2020, 9:33am UTC](https://qa.fmod.com/t/unity-playoneshot-with-a-specific-volume/15370 "2020-01-09T09:33:19Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![tlan](https://avatars.discourse-cdn.com/v4/letter/t/a6a055/32.png) [@tlan](https://qa.fmod.com/u/tlan)\
**Post date:** [January 9, 2020, 9:33am UTC](https://qa.fmod.com/t/unity-playoneshot-with-a-specific-volume/15370/1 "2020-01-09T09:33:19Z")

</div>

Hello,

Is it possible to play a 2D OneShot Sound at a specific volume via Code ?  
Something Like FmodStudio.RuntimeManager.PlayOneShot( string path, float volume ); ?

I am currently struggeling, because i have 2d sound effects, Triggering from various different scripts and I would like to lower the volume / mute the sound if it comes from specific instances of these scripts.

If not, do you have any recommendations how to archieve something like this ?

thanks for any advice

---

<div class="post-metadata">

**Author:** ![alexzzen](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/alexzzen/32/6825_2.png) [@alexzzen](https://qa.fmod.com/u/alexzzen)\
**Post date:** [January 9, 2020, 1:30pm UTC](https://qa.fmod.com/t/unity-playoneshot-with-a-specific-volume/15370/2 "2020-01-09T13:30:11Z")

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I think this is something you can easily change in the code. Take a look at the `PlayOneShot` methods in RuntimeManager.cs:

```
    public static void PlayOneShot(string path, Vector3 position = new Vector3())
    {
        try
        {
            PlayOneShot(PathToGUID(path), position);
        }
        catch (EventNotFoundException)
        {
            Debug.LogWarning("[FMOD] Event not found: " + path);
        }
    }

    public static void PlayOneShot(Guid guid, Vector3 position = new Vector3())
    {
        var instance = CreateInstance(guid);
        instance.set3DAttributes(RuntimeUtils.To3DAttributes(position));
        instance.start();
        instance.release();
    }

```

The first method takes the string you provide as the path argument, i.e. `event:/example`, converts the string to a Guid and passes it to the second `PlayOneShot` method. There is where the actual playing takes place. There a new EventInstance is created, started and immediately released so it gets freed up from memory when the Event finishes playing. This is helpful for one-shot fire and forget sounds, so you don’t have to do these steps for each simple one shot sound.  
Now back to your question: to play a one shot sound with a specific volume you can make use of method overloading in C#. In simple terms it means that methods can have the same name but with different parameters. To achieve this you can duplicate both methods and add a float parameter named volume to both methods like this:

```
    public static void PlayOneShot(string path, float volume, Vector3 position = new Vector3())
    {
        try
        {
            PlayOneShot(PathToGUID(path), volume, position);
        }
        catch (EventNotFoundException)
        {
            Debug.LogWarning("[FMOD] Event not found: " + path);
        }
    }

    public static void PlayOneShot(Guid guid, float volume, Vector3 position = new Vector3())
    {
        var instance = CreateInstance(guid);
        instance.set3DAttributes(RuntimeUtils.To3DAttributes(position));
        instance.setVolume(volume);
        instance.start();
        instance.release();
    }

```

We are adding `EventInstance::setVolume` to the second method before starting the instance, so the instance’s volume gets changed based on your volume argument. Now you can still call `FMODUnity.RuntimeManager.PlayOneShot("event:/example");` for your usual sounds and pass a float variable when you need to control the volume of the one shot: `FMODUnity.RuntimeManager.PlayOneShot("event:/example", 0.5f);`.

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<div class="post-metadata">

**Author:** ![tlan](https://avatars.discourse-cdn.com/v4/letter/t/a6a055/32.png) [@tlan](https://qa.fmod.com/u/tlan)\
**Post date:** [January 9, 2020, 1:47pm UTC](https://qa.fmod.com/t/unity-playoneshot-with-a-specific-volume/15370/3 "2020-01-09T13:47:48Z")

</div>

Thanks a lot.

That’s how I am goona do it ! 🙂

… for some reason I did not thought about overriding / overloading the function. 😅