> ## Documentation Index
> Fetch the complete documentation index at: https://mintlify.com/godotengine/godot/llms.txt
> Use this file to discover all available pages before exploring further.

# AudioEffect

# AudioEffect

**Inherits:** Resource \< RefCounted \< Object

## Description

Base class for audio effect resources. The base Resource for every audio effect. In the editor, an audio effect can be added to the current bus layout through the Audio panel.

## Methods

### \_instantiate (virtual)

```gdscript theme={null}
AudioEffectInstance _instantiate()
```

Override this method to customize the AudioEffectInstance created when this effect is applied on a bus.

## Common Audio Effects

### AudioEffectReverb

Adds reverb to audio.

### AudioEffectDelay

Adds delay/echo effect.

### AudioEffectDistortion

Adds distortion to audio.

### AudioEffectFilter

Filters audio frequencies.

### AudioEffectCompressor

Compresses audio dynamic range.

## Example Usage

<Tabs>
  <Tab title="GDScript">
    ```gdscript theme={null}
    # Create a custom audio effect
    class_name MyAudioEffect
    extends AudioEffect

    @export var strength = 4.0

    func _instantiate():
        var effect = MyAudioEffectInstance.new()
        effect.base = self
        return effect

    # Use built-in effects
    var reverb = AudioEffectReverb.new()
    reverb.room_size = 0.8
    reverb.damping = 0.5

    var bus_idx = AudioServer.get_bus_index("Master")
    AudioServer.add_bus_effect(bus_idx, reverb)
    ```
  </Tab>

  <Tab title="C#">
    ```csharp theme={null}
    // Use built-in effects
    var reverb = new AudioEffectReverb();
    reverb.RoomSize = 0.8f;

    int busIdx = AudioServer.GetBusIndex("Master");
    AudioServer.AddBusEffect(busIdx, reverb);
    ```
  </Tab>
</Tabs>