Audio Audio Mixer and Slider

Hi guys,

I am using Unity 2018.2.6f1
Just want to check if this is a problem with my Unity version. Because in the video tutorial, it was working fine.

I was following this tutorial to create a slider for my sound and music.

The music and sound volume is saved correctly to my playerpref, and i am able to load the value and apply back to the slider that is controlling the exposed Audio mixer group.

But for some reason, the even when the slider is loaded with the playerpref value, the audio mixer is still not showing the loaded value.
https://www.dropbox.com/s/omk111ml23t5vz5/audio.jpg?dl=0

Can anyone tell me what is wrong with my code?

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.Audio;
3. using UnityEngine.UI;
4.  
5. public class MixerController : MonoBehaviour {
6.  
7.     public AudioMixer audioMixer;
8.     [Space(10)]
9.     public Slider musicSlider;
10.     public Slider sfxSlider;
11.  
12.  
13.     public void SetMusicVolume(float volume)
14.     {
15.         audioMixer.SetFloat("musicVolume", volume);
16.     }
17.     public void SetSfxVolume (float volume)
18.     {
19.         audioMixer.SetFloat("sfxVolume", volume);
20.     }
21.     private void OnEnable()
22.     {
23.         //load playerpref and apply to slider UI
24.         musicSlider.value = PlayerPrefs.GetFloat("musicVolume", 0);
25.         sfxSlider.value = PlayerPrefs.GetFloat("sfxVolume", 0);
26.  
27.         //load playerpref for music and sfx volume
28.         //SetMusicVolume(PlayerPrefs.GetFloat("musicVolume", 0));
29.         //SetSfxVolume(PlayerPrefs.GetFloat("sfxVolume", 0));
30.  
31.     }
32.  
33.     private void OnDisable()
34.     {
35.         float musicVolume = 0;
36.         float sfxVolume = 0;
37.  
38.         audioMixer.GetFloat("musicVolume", out musicVolume);
39.         audioMixer.GetFloat("sfxVolume", out sfxVolume);
40.  
41.         PlayerPrefs.SetFloat("musicVolume", musicVolume);
42.         PlayerPrefs.SetFloat("sfxVolume", sfxVolume);
43.         PlayerPrefs.Save();
44.     }
45.  
46. }
47.  

 

Sorry, my bad.
I should have just add a script to camera to change the value of the audio mixer

Code (CSharp):

1. public AudioMixer audioMixer;
2.  
3.     // Use this for initialization
4.     void Start () {
5.         //load from sound music slider
6.         audioMixer.SetFloat("musicVolume", PlayerPrefs.GetFloat("musicVolume", 0));
7.         audioMixer.SetFloat("sfxVolume", PlayerPrefs.GetFloat("sfxVolume", 0));
8.     }