# FindMatchingGroups(string)

> Returns mixer groups whose path contains the specified substring.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine.Audio](/engine/6000.6/script-reference/unityengine/audio.md)
* **Assembly:** UnityEngine.AudioModule

```csharp
public AudioMixerGroup[] FindMatchingGroups(string subPath)
```

### Parameters

**** (\[string]\(https\://learn.microsoft.com/dotnet/api/system.string)): Substring to match against group paths.

### Returns

| Type                                                                                        | Description                                                      |
| ------------------------------------------------------------------------------------------- | ---------------------------------------------------------------- |
| [AudioMixerGroup\[\]](/engine/6000.6/script-reference/unityengine/audio/audiomixergroup.md) | Groups in the mixer whose paths contain the specified substring. |

### Remarks

Connected groups in the mixer form a path from the mixer's master group to the leaves. This path has the format **Master Group/Child of Master Group/Grandchild of Master Group**, and so on.

![AudioMixerFindMatchingGroupsExampleHierarchy (FindMatchingGroups(string))](/api/media?file=/engine/6000.6/media/images/AudioMixerFindMatchingGroupsExampleHierarchy.png)

```csharp
using UnityEngine;
using UnityEngine.Audio;

public class FindMatchingMixerGroups : MonoBehaviour
{
    public AudioMixer mixer;
    const string dropsVolumeParam = "DropsVolume";

    void Start()
    {
        // Returns the group at path Master/WATER/DROPS (see hierarchy image above).
        var dropsGroup = mixer.FindMatchingGroups("DROPS")[0];

        // Returns Master/AMBIENCE/CROWD, Master/AMBIENCE/ROAD, and Master/AMBIENCE.
        var ambienceGroups = mixer.FindMatchingGroups("Master/AMBIENCE");

        // Returns ROAD and RIVER.
        var rGroups = mixer.FindMatchingGroups("/R");

        // Exposed parameters are read and written on the AudioMixer, not on AudioMixerGroup.
        if (dropsGroup.audioMixer.GetFloat(dropsVolumeParam, out float volume))
        {
            Debug.Log($"{dropsVolumeParam}: {volume}");
            dropsGroup.audioMixer.SetFloat(dropsVolumeParam, volume);
        }
    }
}
```

Additional Resources: [AudioMixer.GetFloat](/engine/6000.6/script-reference/unityengine/audio/audiomixer/getfloat.md), [AudioMixer.SetFloat](/engine/6000.6/script-reference/unityengine/audio/audiomixer/setfloat.md), [AudioMixerGroup](/engine/6000.6/script-reference/unityengine/audio/audiomixergroup.md), [AudioMixer](/engine/6000.6/script-reference/unityengine/audio/audiomixer.md).