Audio volume change without 3D sound

Unity Engine
1

HI, I want a song on an object to increase in volume as my player gets closer the the object without the song changing from left to right speakers when the player changes directions. I simply want the volume to increase as the player gets closer, but how do I do that?

The 3D sound makes the music change speakers according to the direction of my player and if its not a 3D sound its the same volume regardless.

2

Hi, I’d have a script attached to the song object that periodically checks the player distance and scales the volume of the audio source accordingly.

1 Like
3

Here’s a quick example. Of course you have to adapt the scaling to work to your preferences (the one in the script is just to make a point).

using UnityEngine;
using System.Collections;

public class ScaleVolume : MonoBehaviour {

    public GameObject Player;
    AudioSource Music;

    // Use this for initialization
    void Start () {
        Music = GetComponent<AudioSource>();
    }
 
    // Update is called once per frame
    void Update () {
        float distance = Vector3.Distance (transform.position, Player.transform.position);

        if(distance < 10) {
            Music.volume = 1 - (distance / 10);
        } else {
            Music.volume = 0;
        }
    }
}
1 Like
4

Thank you very much It worked wonderfully.

5

Here’s a more optimized version of the script @michaelhartung posted:

using UnityEngine;
using System.Collections;

public class ScaleVolume : MonoBehaviour {
    // Don't make settings public unless it's absolutely necessarry
    [SerializeField]
    private Transform reference;

    // Cache our own transform
    private Transform transform;
    private AudioSource audioSource;

    // Use Awake() instead of Start() because you're initializing the GameObject's own, private fields
    private void Awake() {
        transform = GetComponent<Transform>();
        audioSource = GetComponent<AudioSource>();
    }

    private void Update () {
        // Use the squared distance instead of the distance because it's much faster and we don't need the exact value in this case
        float sqrDistance = (reference.position - transform.position).sqrMagnitude;

        // Compare with 10² instead of 10 because we're comparing to distance²
        if(sqrDistance < 100.0f) {
            audioSource.volume = 1.0f - (distance / 1.0f);
        } else {
            audioSource.volume = 0.0f;
        }
    }
}
2 Likes
6

Thanks for the post maybe it’ll help the next guy :wink: