3D spatial audio in Unity

Introduction

3D spatial audio makes sounds feel like they come from specific places around you. It helps games and apps feel more real and immersive.

You want players to hear footsteps coming from behind or beside them.

You want a sound to get quieter as the player moves away from it.

You want to create a realistic environment where sounds change based on position.

You want to guide players by making sounds come from certain directions.

You want to add depth and space to your game's audio experience.

Syntax

Unity

AudioSource audioSource = gameObject.AddComponent<AudioSource>();
audioSource.spatialBlend = 1.0f; // 3D sound
audioSource.clip = yourAudioClip;
audioSource.Play();

Set spatialBlend to 1 for full 3D sound, 0 for 2D sound.

Attach the AudioSource component to the game object that should emit sound.

Examples

Play a footstep sound that moves in 3D space with the game object.

Unity

AudioSource audioSource = gameObject.AddComponent<AudioSource>();
audioSource.clip = footstepClip;
audioSource.spatialBlend = 1.0f;
audioSource.Play();

This plays the sound as 2D, ignoring 3D position.

Unity

audioSource.spatialBlend = 0.0f;
audioSource.Play();

Set how close or far the sound can be heard clearly.

Unity

audioSource.minDistance = 1f;
audioSource.maxDistance = 20f;

Sample Program

This script adds an AudioSource to the game object, sets the sound clip, and enables 3D spatial audio. The sound will appear to come from the object's position and get quieter as you move away.

Unity

using UnityEngine;

public class SpatialAudioExample : MonoBehaviour
{
    public AudioClip soundClip;
    private AudioSource audioSource;

    void Start()
    {
        audioSource = gameObject.AddComponent<AudioSource>();
        audioSource.clip = soundClip;
        audioSource.spatialBlend = 1.0f; // Enable 3D sound
        audioSource.minDistance = 1f;
        audioSource.maxDistance = 15f;
        audioSource.Play();
    }
}

Important Notes

Make sure your AudioListener (usually on the main camera) is active to hear 3D sounds.

Use minDistance and maxDistance to control how sound fades with distance.

Test your sounds in the Unity Editor by moving the camera or object to hear the spatial effect.

Summary

3D spatial audio makes sounds come from specific places in your game world.

Use the AudioSource component with spatialBlend = 1 to enable 3D sound.

Adjust distance settings to control how sound fades as you move around.