Fade in/out music when enter/exit trigger

Questions & Answers
1

Hi everybody !
I’m really new to scripting and i’m in encounter a problem that make me crazy !
I’ve a multiplpe trigger zone when you entering them, an audioclip will be played (link the audio to the inspector).
I’ve this :

using UnityEngine;
var audioSource : AudioSource;

	
public class AudioTrigger : MonoBehaviour
{
	public float fadeOutFactor = 0.1f;
	float audioVolume;

    void OnTriggerEnter(Collider other) 
    {
    	audio.Play();
    }
    
    void OnTriggerExit() 
    {
   		audio.Stop();
    }
    
	public void fadeIn()
	{
		if (audio < 1)
		{
			audio += 0.1 * Time.deltaTime;
			audio.volume = audio2Volume;
		}
	}
 
	public void fadeOut() 
	{
		if(audio > 0.1)
		{
			audio -= 0.1 * Time.deltaTime;
			audio.volume = audio1Volume;
		}
	}
}

But this doesn’t work…
Can you explain me why and how to repair this ?
Thanks :wink:

2

I haven’t done much myself with audio yet, but seeing your code you’re missing out on one thing. You’re increasing and decreasing a value called “audio”. I don’t know what that will do, but in your case you need to use audio.volume (at least, I reckon). Add and substract the 0.1* deltatime to/from that. Also, don’t forget the 0.1 needs to be a float!

Edit: Shouldn’t you be getting errors?
The audioSource isn’t defined correctly assuming you’re using c#. You’re also not referencing to the actual audiosource itself.

using UnityEngine;
private AudioSource audio;
 
 
public class AudioTrigger : MonoBehaviour
{
    //These 2 fields aren't used anymore now
    public float fadeOutFactor = 0.1f;
    float audioVolume;
 
    void OnTriggerEnter(Collider other) 
    {
        audio.Play();
    }
 
    void OnTriggerExit() 
    {
           audio.Stop();
    }
 
    public void fadeIn()
    {
        if (audio.volume < 1)
        {
            audio.volume += 0.1f * Time.deltaTime;
        }
    }

    public void fadeOut()
    {
        if (audio.volume > 0.1)
        {
            audio.volume -= 0.1f * Time.deltaTime;
        }
    }
}
3

Hello, this is a simple Audio fade in / fade out script, with trigger function.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;


[RequireComponent(typeof(AudioSource))]
public class ??????????? : MonoBehaviour {

    public AudioSource audio;
        
    public float fadeOutFactor = 0.08f;
    public float fadeInFactor = 0.08f;

    private bool fadeInOut = false;

    void Start()
    {
        audio.volume = 0.0f;
    }

    void Update()
    {
        if (audio.volume <= 0.0f) { audio.Stop(); }
        if (audio.volume >= 1.0f) { audio.Play(); }

        if (fadeInOut == true)
        {
            if (audio.volume < 1.0f)
            {
                audio.volume += fadeInFactor * Time.deltaTime;
            }
        }

        if (fadeInOut == false)
        {
            if (audio.volume > 0.0f)
            {
                audio.volume -= fadeOutFactor * Time.deltaTime;
            }
        }

    }

    void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.CompareTag("Player"))
        {
            fadeInOut = true;
        }     
    }

    void OnTriggerExit(Collider other)
    {
        if (other.gameObject.CompareTag("Player"))
        {
            fadeInOut = false;
        }        
    }    
}