3D spatial audio in Unity - Mini Project: Build & Apply

3D Spatial Audio Setup in Unity

📖 Scenario: You are creating a simple Unity scene where a sound source plays 3D spatial audio. This means the sound changes based on the listener's position, making it feel like it comes from a specific place in the 3D world.

🎯 Goal: Build a Unity script that sets up a 3D audio source with spatial blend and plays a sound clip so the player hears it as coming from a point in space.

📋 What You'll Learn

Create an AudioSource component with a 3D sound clip

Set the spatial blend of the AudioSource to fully 3D

Position the AudioSource in the scene

Play the audio clip when the scene starts

💡 Why This Matters

🌍 Real World

3D spatial audio is used in games and VR to create immersive sound experiences that match the player's position and movement.

💼 Career

Understanding how to set up and control 3D audio sources is essential for game developers and VR content creators to enhance realism and user engagement.

1

Create an AudioSource variable and assign an AudioClip

In a new C# script, create a public variable called audioSource of type AudioSource and a public variable called clip of type AudioClip. This will hold the sound you want to play.

Unity

using UnityEngine;

public class SpatialAudioSetup : MonoBehaviour
{
    // Your code here
}

Need a hint?

Use public AudioSource audioSource; and public AudioClip clip; inside the class.

2

Set the spatial blend of the AudioSource to 3D

Inside the Start() method, set the spatialBlend property of audioSource to 1.0f to make the sound fully 3D.

Unity

using UnityEngine;

public class SpatialAudioSetup : MonoBehaviour
{
    public AudioSource audioSource;
    public AudioClip clip;

    void Start()
    {
        // Set spatial blend to 3D
        // Your code here
    }
}

Need a hint?

Inside Start(), write audioSource.spatialBlend = 1.0f;.

3

Assign the AudioClip to the AudioSource and position it

Still inside Start(), assign clip to audioSource.clip and set the transform.position of the audioSource GameObject to new Vector3(0, 1, 0).

Unity

using UnityEngine;

public class SpatialAudioSetup : MonoBehaviour
{
    public AudioSource audioSource;
    public AudioClip clip;

    void Start()
    {
        audioSource.spatialBlend = 1.0f;
        // Assign clip and position audioSource
        // Your code here
    }
}

Need a hint?

Set audioSource.clip = clip; and audioSource.transform.position = new Vector3(0, 1, 0); inside Start().

4

Play the audio clip when the scene starts

Add a line inside Start() to call audioSource.Play() so the sound plays automatically when the scene begins.

Unity

using UnityEngine;

public class SpatialAudioSetup : MonoBehaviour
{
    public AudioSource audioSource;
    public AudioClip clip;

    void Start()
    {
        audioSource.spatialBlend = 1.0f;
        audioSource.clip = clip;
        audioSource.transform.position = new Vector3(0, 1, 0);
        // Play the audio
        // Your code here
    }
}

Need a hint?

Call audioSource.Play(); inside Start() to start the sound.