--- name: AudioEmitter last_updated: 2026-06-25T22:10:50Z inherits: - Instance - Object type: class memory_category: Internal summary: "Emits audio streams into the world." --- # Class: AudioEmitter > Emits audio streams into the world. ## Description [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md) emits audio streams into the world. It provides a single **Input** pin that can be connected to by one or more [Wires](/docs/reference/engine/classes/Wire.md). Any streams wired to an [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md) get broadcasted into the world from the emitter's parent's position. If the parent is an [Attachment](/docs/reference/engine/classes/Attachment.md), [Camera](/docs/reference/engine/classes/Camera.md), or [PVInstance](/docs/reference/engine/classes/PVInstance.md), the parent's world-position will be used. If the parent is not one of these classes, the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md) is effectively silent. [AudioEmitters](/docs/reference/engine/classes/AudioEmitter.md) are heard by [AudioListeners](/docs/reference/engine/classes/AudioListener.md) in order to implement 3D spatialization. ## Code Samples **Playing one asset from multiple 3d locations at once** ```lua local part1: BasePart = workspace.Speakers.Left local part2: BasePart = workspace.Speakers.Right local player: AudioPlayer = workspace.AudioPlayer local leftEmitter = Instance.new("AudioEmitter") local rightEmitter = Instance.new("AudioEmitter") local toLeft = Instance.new("Wire") local toRight = Instance.new("Wire") leftEmitter.Parent = part1 rightEmitter.Parent = part2 toLeft.Parent = leftEmitter toLeft.SourceInstance = player toLeft.TargetInstance = leftEmitter toRight.Parent = rightEmitter toRight.SourceInstance = player toRight.TargetInstance = rightEmitter player:Play() ``` ## Properties ### Property: AudioEmitter.AcousticSimulationEnabled ```json { "type": "boolean", "access": "ReadWrite", "security": { "read": "None", "write": "None" }, "serialization": { "can_load": true, "can_save": true }, "thread_safety": "ReadSafe", "category": "Simulation", "capabilities": [ "Audio" ] } ``` Determines whether sound from this [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md) shoud automatically implement features of acoustic simulation, such as occlusion (being muffled through walls), diffraction (bending around corners), and reverberation (echoing off of walls), when being heard by an [AudioListener](/docs/reference/engine/classes/AudioListener.md). Note that the [AudioListener](/docs/reference/engine/classes/AudioListener.md) also needs its [AcousticSimulationEnabled](/docs/reference/engine/classes/AudioListener.md) property set to `true` for the effects to occur. ### Property: AudioEmitter.AngleAttenuation ```json { "type": "Flyweight", "access": "ReadOnly", "security": { "read": "RobloxEngineSecurity", "write": "RobloxEngineSecurity" }, "serialization": { "can_load": true, "can_save": true }, "thread_safety": "ReadSafe", "category": "Emission", "capabilities": [ "Audio" ] } ``` Represents a volume-over-angle curve that affects how loudly a [AudioListener](/docs/reference/engine/classes/AudioListener.md) will hear the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md), based on the angle between them and the [LookVector](/docs/reference/engine/datatypes/CFrame.md) associated with the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md). This property is internal and can't be accessed by scripts; it exists to support replication. See [SetAngleAttenuation()](/docs/reference/engine/classes/AudioEmitter.md) for usage details. ### Property: AudioEmitter.AudioInteractionGroup ```json { "type": "string", "access": "ReadWrite", "security": { "read": "None", "write": "None" }, "serialization": { "can_load": true, "can_save": true }, "thread_safety": "ReadSafe", "category": "Interactions", "capabilities": [ "Audio" ] } ``` If an [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md) and an [AudioListener](/docs/reference/engine/classes/AudioListener.md) share an interaction group, then the listener is capable of hearing the emitter. ### Property: AudioEmitter.DistanceAttenuation ```json { "type": "Flyweight", "access": "ReadOnly", "security": { "read": "RobloxEngineSecurity", "write": "RobloxEngineSecurity" }, "serialization": { "can_load": true, "can_save": true }, "thread_safety": "ReadSafe", "category": "Emission", "capabilities": [ "Audio" ] } ``` Represents a volume-over-distance curve that affects how loudly a [AudioListener](/docs/reference/engine/classes/AudioListener.md) will hear the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md), based on the distance between them. This property is internal and can't be accessed by scripts; it exists to support replication. See [SetDistanceAttenuation()](/docs/reference/engine/classes/AudioEmitter.md) for usage details. ### Property: AudioEmitter.SimulationFidelity ```json { "type": "AudioSimulationFidelity", "access": "ReadWrite", "security": { "read": "None", "write": "None" }, "serialization": { "can_load": true, "can_save": true }, "deprecated": true, "thread_safety": "ReadSafe", "category": "Simulation", "capabilities": [ "Audio" ] } ``` Controls how detailed the audio simulation should be for this [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md), similar to [MeshPart.CollisionFidelity](/docs/reference/engine/classes/MeshPart.md) or [MeshPart.RenderFidelity](/docs/reference/engine/classes/MeshPart.md). [AudioEmitters](/docs/reference/engine/classes/AudioEmitter.md) and [AudioListeners](/docs/reference/engine/classes/AudioListener.md) which disagree on the necessary level of detail will use the less-detailed option. ## Methods ### Method: AudioEmitter:GetAngleAttenuation **Signature:** `AudioEmitter:GetAngleAttenuation(): Dictionary` Returns a table mapping angle to volume. Keys are numbers between `0` and `180` (inclusive), while values are numbers between `0` and `1` (inclusive) describing how volume attenuates depending on direction. This method returns an empty table if the default angle attenuation curve is being used. *Security: None · Thread Safety: Unsafe · Capabilities: Audio* **Returns:** `Dictionary` — Table mapping angle to volume, as described above. ### Method: AudioEmitter:GetAudibilityFor **Signature:** `AudioEmitter:GetAudibilityFor(listener: AudioListener): float` Calculates how audible this emitter is for a particular [AudioListener](/docs/reference/engine/classes/AudioListener.md). The resulting volume, ranging from `0` to `1`, accounts for distance and angle attenuation on both the emitter and listener. *Security: None · Thread Safety: Unsafe · Capabilities: Audio* **Parameters:** | Name | Type | Default | Description | |------|------|---------|-------------| | `listener` | `AudioListener` | | | **Returns:** `float` ### Method: AudioEmitter:GetConnectedWires **Signature:** `AudioEmitter:GetConnectedWires(pin: string): List` Returns an array of [Wires](/docs/reference/engine/classes/Wire.md) that are connected to the specified pin. [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md) has one "Input" pin. *Security: None · Thread Safety: Unsafe · Capabilities: Audio* **Parameters:** | Name | Type | Default | Description | |------|------|---------|-------------| | `pin` | `string` | | An input or output pin on this instance | **Returns:** `List` — An array of [Wires](/docs/reference/engine/classes/Wire.md) ### Method: AudioEmitter:GetDistanceAttenuation **Signature:** `AudioEmitter:GetDistanceAttenuation(): Dictionary` Returns a table mapping distance to volume. Keys are numbers greater than or equal to 0, while values are numbers between 0 and 1 (inclusive) describing how volume attenuates over distance. This method returns an empty table if the default distance attenuation curve is being used. *Security: None · Thread Safety: Unsafe · Capabilities: Audio* **Returns:** `Dictionary` ### Method: AudioEmitter:GetInputPins **Signature:** `AudioEmitter:GetInputPins(): Array` Gets the list of pins that [Wire](/docs/reference/engine/classes/Wire.md) can use in [Wire.TargetName](/docs/reference/engine/classes/Wire.md) to connect to this instance via its [Wire.TargetInstance](/docs/reference/engine/classes/Wire.md) property. For [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md), this is `Input` only. *Security: None · Thread Safety: Unsafe · Capabilities: Audio* **Returns:** `Array` — An array of strings representing valid pin names. ### Method: AudioEmitter:GetInteractingListeners **Signature:** `AudioEmitter:GetInteractingListeners(): List` Returns an array of [AudioListeners](/docs/reference/engine/classes/AudioListener.md) that share an [AudioInteractionGroup](/docs/reference/engine/classes/AudioEmitter.md) with the emitter. *Security: None · Thread Safety: Unsafe · Capabilities: Audio* **Returns:** `List` ### Method: AudioEmitter:GetOutputPins **Signature:** `AudioEmitter:GetOutputPins(): Array` Gets the list of pins that [Wire](/docs/reference/engine/classes/Wire.md) can use in [Wire.SourceName](/docs/reference/engine/classes/Wire.md) to connect to this instance via its [Wire.SourceInstance](/docs/reference/engine/classes/Wire.md) property. For [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md), there are none. *Security: None · Thread Safety: Unsafe · Capabilities: Audio* **Returns:** `Array` — An array of strings representing valid pin names. ### Method: AudioEmitter:SetAngleAttenuation **Signature:** `AudioEmitter:SetAngleAttenuation(curve: Dictionary): ()` Sets a volume-over-angle curve that affects how loudly a [AudioListener](/docs/reference/engine/classes/AudioListener.md) will hear the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md), based on the angle between them and the [LookVector](/docs/reference/engine/datatypes/CFrame.md) associated with the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md). The curve is represented by a table mapping angle keys to volume values. Keys are expected to be unique numbers between `0` and `180` (inclusive), while values are expected to be numbers between `0` and `1` (inclusive). Tables containing up to 400 key-value pairs are supported. The volume of the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md) from the perspective of a [AudioListener](/docs/reference/engine/classes/AudioListener.md) at an angle `a` is determined by linearly interpolating between the volume levels for the points on the curve whose angle values are directly above and below `a`. If there is either no point below `a` or no point above `a`, the volume level of the other point is chosen. Essentially, the curve is a sequence of points connected by straight lines, and beyond its left and right endpoints the curve extends outward at their respective volume levels. This volume will be multiplied with the volumes from all other attenuation curves (including the ones on the receiving [AudioListener](/docs/reference/engine/classes/AudioListener.md)) to obtain the final audibility. If the table is empty or `nil`, the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md) defaults to using an angle attenuation curve with the constant volume value of `1`. *Security: None · Thread Safety: Unsafe · Capabilities: Audio* **Parameters:** | Name | Type | Default | Description | |------|------|---------|-------------| | `curve` | `Dictionary` | | | **Returns:** `()` ### Method: AudioEmitter:SetDistanceAttenuation **Signature:** `AudioEmitter:SetDistanceAttenuation(curve: Dictionary): ()` Sets a volume-over-distance curve that affects how loudly a [AudioListener](/docs/reference/engine/classes/AudioListener.md) will hear the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md), based on the distance between them. The curve is represented by a table mapping distance keys to volume values. Keys are expected to be unique numbers greater than or equal to 0, while values are expected to be numbers between 0 and 1 (inclusive). Tables containing up to 400 key-value pairs are supported. The volume of the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md) from the perspective of a [AudioListener](/docs/reference/engine/classes/AudioListener.md) at a distance `d` is determined by linearly interpolating between the volume levels for the points on the curve whose distance values are directly above and below `d`. If there is either no point below `d` or no point above `d`, the volume level of the other point is chosen. Essentially, the curve is a sequence of points connected by straight lines, and beyond its left and right endpoints the curve extends outward infinitely at their respective volume levels. This volume will be multiplied with the volumes from all other attenuation curves (including the ones on the receiving [AudioListener](/docs/reference/engine/classes/AudioListener.md)) to obtain the final audibility. If the table is empty or `nil`, the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md) defaults to using a distance attenuation curve determined by the inverse-square law. *Security: None · Thread Safety: Unsafe · Capabilities: Audio* **Parameters:** | Name | Type | Default | Description | |------|------|---------|-------------| | `curve` | `Dictionary` | | | **Returns:** `()` **Custom Distance Attenuation** ```lua local Players = game:GetService("Players") local emitterPart = Instance.new("Part") emitterPart.Anchored = true emitterPart.Position = Vector3.new(0, 0, 0) emitterPart.Parent = workspace local emitter: AudioEmitter = Instance.new("AudioEmitter") emitter.Parent = emitterPart local curve = {} curve[10] = 1 -- Within a distance of 10 studs, listeners hear this emitter at full volume curve[100] = 0.4 -- At a distance of 100 studs, listeners hear this emitter at 40% volume curve[300] = 0 -- At any distance farther than 300 studs, listeners cannot hear this emitter emitter:SetDistanceAttenuation(curve) -- Replicate the rolloff curve from the old voice implementation -- Default voice without the new audio API uses quadratic rolloff ranging from 7 to 80 studs local MIN_DISTANCE = 7 local MAX_DISTANCE = 80 local CURVE_STEP_SIZE = 2 local voiceCurve = {} for i = MIN_DISTANCE, MAX_DISTANCE, CURVE_STEP_SIZE do voiceCurve[i] = ((i - MIN_DISTANCE) - (MAX_DISTANCE - MIN_DISTANCE)) ^ 2 / (MAX_DISTANCE - MIN_DISTANCE) ^ 2 end voiceCurve[MAX_DISTANCE] = 0 local function setVoiceCurve(character) local voiceEmitter: AudioEmitter = character:WaitForChild("AudioEmitter") voiceEmitter:SetDistanceAttenuation(voiceCurve) end for _, player in Players:GetPlayers() do if player.Character then setVoiceCurve(player.Character) end player.CharacterAdded:Connect(setVoiceCurve) end ``` ## Events ### Event: AudioEmitter.WiringChanged **Signature:** `AudioEmitter.WiringChanged(connected: boolean, pin: string, wire: Wire, instance: Instance)` Event that fires after a [Wire](/docs/reference/engine/classes/Wire.md) becomes connected or disconnected, and that [Wire](/docs/reference/engine/classes/Wire.md) is now or was previously connected to a pin on the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md) and to some other wirable instance. *Security: None · Capabilities: Audio* **Parameters:** | Name | Type | Description | |------|------|-------------| | `connected` | `boolean` | Whether the instance got connected or disconnected. | | `pin` | `string` | The pin on the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md) that the [Wire](/docs/reference/engine/classes/Wire.md) targets. | | `wire` | `Wire` | The [Wire](/docs/reference/engine/classes/Wire.md) between the [AudioEmitter](/docs/reference/engine/classes/AudioEmitter.md) and the other instance. | | `instance` | `Instance` | The other instance that is or was connected through the [Wire](/docs/reference/engine/classes/Wire.md). | ## Inherited Members ### 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`**: Returns an array containing all descendants of the instance that match the - **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