Spatial Audio in Unreal Engine: A Guide to Attenuation and Audio Volumes

What will you learn in this guide?

Unreal Engine lets you configure more than whether audio is on or off. A sound source can get louder as the listener approaches, fade into the distance, come from a specific direction, or take on the reverb character of a space. This guide covers two core tools: Sound Attenuation settings and the Audio Volume actor.

Sound Attenuation lets you define how a sound’s volume changes with distance, as well as its spatialization and air absorption behavior. Audio Volumes apply audio-processing settings in areas defined in a Blueprint level; for example, you can assign reverb to an area. The distinction matters: the first controls how an individual sound source is heard relative to the listener, while the second can change the ambient audio according to the listener’s location.

Requirements

You’ll need an Unreal Engine project and a Level containing audio. Audio Volume is an actor that can be used in a Blueprint level. Sound Attenuation settings control the behavior of an audio source. The official guides do not require a particular Unreal Engine version, account type, or hardware specification, so it isn’t possible to provide a version number or system recommendation here.

If your audio file and other project audio settings aren’t ready, first decide which sound source you want to test and how it will be used. It might be a point effect, room ambience, a sound traveling along a pipe, or audio from a directional speaker. The use case will help determine the right attenuation shape and spatialization method.

Set up audio behavior step by step

1. Identify the sound’s role and the listener. The Unreal Engine guide notes that the listener is usually the player, but doesn’t have to be. Consider where the sound should be heard from and how the listener will move. A static room tone calls for a different approach than an effect coming from a specific point.

2. Choose an attenuation shape for the use case. Sphere is the default shape for point sounds. Capsule can suit sources that shouldn’t come from a single point, such as water running along a pipe. Box can bring a room tone or ambience area closer to the boundaries of a space. Cone can be used for directional audio, such as a speaker. The shape’s inner region defines where the sound remains at its highest level; the outer boundary marks where it reaches its minimum level.

3. Set the inner area and falloff distance. Depending on the selected shape, properties such as Inner Radius, Capsule Half Height, Extents, or Cone Radius define the inner area. Falloff Distance sets the size of the outer region beyond the edge of that inner area. When adjusting the volume, first define where you want the sound to remain at full level, then set the distance at which the fade should finish. Also check whether distance-based attenuation is enabled; when it’s off, the sound plays at full level regardless of distance.

4. Choose a distance falloff curve. Linear provides a constant rate of change over distance and suits large background sounds that don’t need focused 3D positioning. Logarithmic makes the change more noticeable at close range and less noticeable farther away. Inverse strengthens this behavior, while Log Reverse reduces the change at close range and makes it more noticeable at a distance. Natural Sound is described as an option between Logarithmic and Inverse. If the built-in curves aren’t enough, use Custom to draw a function in the curve editor or assign an existing Float Curve.

5. Consider spatialization and air absorption. When spatialization is enabled, the sound is heard from a specific world position, and its pan changes as the listener moves. When disabled, the sound becomes flat, with no panning based on the source’s location; this can be useful for sounds that shouldn’t come from a particular point, such as room tone. Panning is the default Spatialization Method and is recommended for use with speakers. The Binaural method relies on an active binaural plugin and requires headphones. Optional Air Absorption configures filter behavior that models high frequencies fading more quickly as distance increases. You can define the minimum and maximum distance range for the filter, along with the low-pass filter’s cutoff settings.

6. Place Audio Volumes for room zones. Use the Audio Volume’s location, rotation, and scale settings to cover the area to be processed. The Brush Shape option lets you create volumes such as Box, Cone, Cylinder, or Sphere; Geometry Editing mode lets you adapt the shape to specific areas. The guide also notes that some preset shapes may not be practical for audio use. Hollow is not recommended for general audio use.

7. Set reverb and priorities for overlapping volumes. In Audio Volume, use Apply Reverb to enable or disable reverb, Reverb Effect to select the asset, Volume to set the effect level, and Fade Time to set the transition duration. The default reverb Volume in the guide is 0.5. If volumes are nested or overlap, assign different Priority values: a higher number means a higher priority. Priority isn’t applied between two overlapping volumes with the same priority. This lets a room’s own settings take effect when a smaller room is inside a larger surrounding volume.

Impact on architecture, interiors, and archviz workflows

These settings are particularly useful for teams creating walkthroughs or space-focused experiences in Unreal Engine. You can place room ambience within a specific volume, create reverb transitions between indoor and outdoor areas, or make the location of a sound source audible. Beforehand, the team should decide whether a sound should come from a specific point or fill the area more generally; that choice affects both spatialization and the attenuation shape.

For nested volumes, check the priority order and fade transitions. If you want to avoid an abrupt transition, consider a longer fade time between spaces with very different reverb settings; a faster transition may suit similar settings. For headphone presentations, keep in mind that the binaural method requires a plugin. For speaker presentations, consider the guide’s recommendation to use Panning. The official sources don’t provide information about specific hardware, licensing costs, or compatibility with archviz software; verify these separately when setting up a project.

Common mistakes

• Using the same attenuation shape for every sound: Room ambience, a directional speaker, and a sound traveling along a pipe have different spatial needs.

• Confusing the inner area with falloff distance: The inner area defines where the sound remains at full level; Falloff Distance sets how far the fade extends beyond it.

• Always enabling spatialization: Disabling spatialization may be more appropriate for a sound that shouldn’t come from a specific point, such as room tone.

• Giving overlapping Audio Volumes the same priority: Priority isn’t used to resolve overlap between volumes with the same priority value.

• Evaluating binaural audio for a speaker setup: According to the guide, binaural panning requires headphones and doesn’t translate well to speakers.

Next steps

Start by setting up one sound source and one room volume. Move the listener through the inner area, the falloff region, and around the volume boundaries to check the audio level and transitions. Then compare different attenuation curves and shapes. If you’re using multiple rooms, review the volume overlaps, priority values, and reverb fade times together. Finally, choose between Panning and binaural audio based on the intended presentation format, and consider whether air absorption settings are needed.

Sources and licensing

This guide is adapted from Epic Games’ official “Sound Attenuation in Unreal Engine” and “Audio Volumes in Unreal Engine” documentation. Both sources are marked as freely licensed in the provided source list; their content has been retold in Turkish.