--- name: EchoSoundEffect last_updated: 2026-06-10T23:09:11Z inherits: - SoundEffect - Instance - Object type: class memory_category: Instances summary: "Adds delayed repetitions of a sound with diminishing volume." --- # Class: EchoSoundEffect > Adds delayed repetitions of a sound with diminishing volume. ## Description An echo effect causes a sound to repeat on a delay with diminishing volume, simulating the real effect of an echo. This effect can be applied to either an individual sound or to a sound group by parenting it to the desired instance. The effect is controlled by several properties. First, the Delay is how long the effect will wait to play the echoed sound. Feedback determines how much the original signal is diminished to play as the echoed sound. Note that this echoed sound also goes through the echo effect which will wait another delay and play another echo. This process will repeat until the volume of the echoed sound is negligible. You can also adjust the wet/dry mix of the effect. The dry component of the sound is the original sound that the effect is being applied to. You can adjust the volume of the dry sound by adjusting the DryLevel. The wet sound is the echoed effect itself, and its volume can be adjusted with WetLevel. It is recommended to only use the EchoSoundEffect with sound groups. If an echo effect is applied to a regular Sound, once that sound stops playing the echo effect will also be cut off. When applied to a SoundGroup, the echo effect will continue playing even if the original source sound has stopped.Like all other [SoundEffect](/docs/reference/engine/classes/SoundEffect.md), a EchoSoundEffect can be applied either to a [Sound](/docs/reference/engine/classes/Sound.md) or [SoundGroup](/docs/reference/engine/classes/SoundGroup.md) by being parented to either. ## Properties ### Property: EchoSoundEffect.Delay ```json { "type": "float", "access": "ReadWrite", "security": { "read": "None", "write": "None" }, "serialization": { "can_load": true, "can_save": true }, "thread_safety": "ReadSafe", "category": "State", "capabilities": [ "LegacySound" ] } ``` Range: 0.01 to 5 (default 1) The amount of time between echoes. Measured in seconds. If a EchoSoundEffect is applied to a singular sound instead of a sound group, if the sound stops playing before the delay causes an echo, the echo will not play. Because of this, it is recommended to apply echo effects to SoundGroups and not Sounds. ### Property: EchoSoundEffect.DryLevel ```json { "type": "float", "access": "ReadWrite", "security": { "read": "None", "write": "None" }, "serialization": { "can_load": true, "can_save": true }, "thread_safety": "ReadSafe", "category": "State", "capabilities": [ "LegacySound" ] } ``` Range: -80 to 10 (default 0) The output volume of the original sound. ### Property: EchoSoundEffect.Feedback ```json { "type": "float", "access": "ReadWrite", "security": { "read": "None", "write": "None" }, "serialization": { "can_load": true, "can_save": true }, "thread_safety": "ReadSafe", "category": "State", "capabilities": [ "LegacySound" ] } ``` Range: 0 to 1 (default 0.5) The echo decay every time the echo plays. Setting this at it's minimum (0) will cause no feedback, meaning the echo won't be audible at all. Setting this at the maximum (1) will have no decay, meaning the echoed sound will play at the level of the original and will not diminish over time. ### Property: EchoSoundEffect.WetLevel ```json { "type": "float", "access": "ReadWrite", "security": { "read": "None", "write": "None" }, "serialization": { "can_load": true, "can_save": true }, "thread_safety": "ReadSafe", "category": "State", "capabilities": [ "LegacySound" ] } ``` Range: -80 to 10 (default 0) The output volume of the echoed effect. ## Inherited Members ### From [SoundEffect](/docs/reference/engine/classes/SoundEffect.md) - **Property `Enabled`** (`boolean`): Toggles the effect on and off. - **Property `Priority`** (`int`): Determines the order the effect will be applied in relation to other ### From [Instance](/docs/reference/engine/classes/Instance.md) - **Property `Archivable`** (`boolean`): Determines if an Instance and its descendants can be cloned using - **Property `archivable`** (`boolean`): *(deprecated, hidden)* - **Property `Capabilities`** (`SecurityCapabilities`): The set of capabilities allowed to be used for scripts inside this - **Property `Name`** (`string`): A non-unique identifier of the Instance. - **Property `Parent`** (`Instance`): Determines the hierarchical parent of the Instance. - **Property `PredictionMode`** (`PredictionMode`): - **Property `RobloxLocked`** (`boolean`): A deprecated property that used to protect CoreGui objects. *(hidden)* - **Property `Sandboxed`** (`boolean`): When enabled, the instance can only access abilities in its `Capabilities` - **Property `UniqueId`** (`UniqueId`): A unique identifier for the instance. - **Method `AddTag(tag: string): ()`**: Applies a tag to the instance. - **Method `children(): Instances`**: Returns an array of the object's children. *(deprecated)* - **Method `ClearAllChildren(): ()`**: This method destroys all of an instance's children. - **Method `Clone(): Instance`**: Create a copy of an instance and all its descendants, ignoring instances - **Method `clone(): Instance`**: *(deprecated)* - **Method `Destroy(): ()`**: Sets the Instance.Parent property to `nil`, locks the - **Method `destroy(): ()`**: *(deprecated)* - **Method `FindFirstAncestor(name: string): Instance?`**: Returns the first ancestor of the Instance whose - **Method `FindFirstAncestorOfClass(className: string): Instance?`**: Returns the first ancestor of the Instance whose - **Method `FindFirstAncestorWhichIsA(className: string): Instance?`**: Returns the first ancestor of the Instance for whom - **Method `FindFirstChild(name: string, recursive?: boolean): Instance?`**: Returns the first child of the Instance found with the given name. - **Method `findFirstChild(name: string, recursive?: boolean): Instance`**: *(deprecated)* - **Method `FindFirstChildOfClass(className: string): Instance?`**: Returns the first child of the Instance whose - **Method `FindFirstChildWhichIsA(className: string, recursive?: boolean): Instance?`**: Returns the first child of the Instance for whom - **Method `FindFirstDescendant(name: string): Instance?`**: Returns the first descendant found with the given Instance.Name. - **Method `GetActor(): Actor?`**: Returns the Actor associated with the Instance, if any. - **Method `GetAttribute(attribute: string): Variant`**: Returns the value which has been assigned to the given attribute name. - **Method `GetAttributeChangedSignal(attribute: string): RBXScriptSignal`**: Returns an event that fires when the given attribute changes. - **Method `GetAttributes(): Dictionary`**: Returns a dictionary of the instance's attributes. - **Method `GetChildren(): Instances`**: Returns an array containing all of the instance's children. - **Method `getChildren(): Instances`**: *(deprecated)* - **Method `GetDebugId(scopeLength?: int): string`**: Returns a coded string of the debug ID used internally by Roblox. - **Method `GetDescendants(): Instances`**: Returns an array containing all of the descendants of the instance. - **Method `GetFullName(): string`**: Returns a string describing the instance's ancestry. - **Method `GetStyled(name: string, selector: string?): Variant`**: Returns the styled or explicitly modified value of the specified property, - **Method `GetStyledPropertyChangedSignal(property: string): RBXScriptSignal`**: - **Method `GetTags(): Array`**: Gets an array of all tags applied to the instance. - **Method `HasTag(tag: string): boolean`**: Check whether the instance has a given tag. - **Method `IsAncestorOf(descendant: Instance): boolean`**: Returns true if an Instance is an ancestor of the given - **Method `IsDescendantOf(ancestor: Instance): boolean`**: Returns `true` if an Instance is a descendant of the given - **Method `isDescendantOf(ancestor: Instance): boolean`**: *(deprecated)* - **Method `IsPropertyModified(property: string): boolean`**: Returns `true` if the value stored in the specified property is not equal - **Method `QueryDescendants(selector: string): Instances`**: - **Method `Remove(): ()`**: Sets the object's `Parent` to `nil`, and does the same for all its *(deprecated)* - **Method `remove(): ()`**: *(deprecated)* - **Method `RemoveTag(tag: string): ()`**: Removes a tag from the instance. - **Method `ResetPropertyToDefault(property: string): ()`**: Resets a property to its default value. - **Method `SetAttribute(attribute: string, value: Variant): ()`**: Sets the attribute with the given name to the given value. - **Method `WaitForChild(childName: string, timeOut: double): Instance`**: Returns the child of the Instance with the given name. If the - **Event `AncestryChanged`**: Fires when the Instance.Parent property of this object or one of - **Event `AttributeChanged`**: Fires whenever an attribute is changed on the Instance. - **Event `ChildAdded`**: Fires after an object is parented to this Instance. - **Event `childAdded`**: *(deprecated)* - **Event `ChildRemoved`**: Fires after a child is removed from this Instance. - **Event `DescendantAdded`**: Fires after a descendant is added to the Instance. - **Event `DescendantRemoving`**: Fires immediately before a descendant of the Instance is removed. - **Event `Destroying`**: Fires immediately before (or is deferred until after) the instance is - **Event `StyledPropertiesChanged`**: Fires whenever any style property is changed on the instance, including ### From [Object](/docs/reference/engine/classes/Object.md) - **Property `ClassName`** (`string`): A read-only string representing the class this Object belongs to. - **Property `className`** (`string`): *(deprecated)* - **Method `GetPropertyChangedSignal(property: string): RBXScriptSignal`**: Get an event that fires when a given property of the object changes. - **Method `IsA(className: string): boolean`**: Returns true if an object's class matches or inherits from a given class. - **Method `isA(className: string): boolean`**: *(deprecated)* - **Event `Changed`**: Fires immediately after a property of the object changes, with some