One 、 Preface

In the process of game development , Plan to set up a global control volume gui Interface , At the same time, you can control the background music and other game special effects separately , So we used Audio Mixer solve

Two 、 step

1、 Create a volume adjustment panel UI

Created two sliders , Control the background music and sound effects of the game respectively , And set the default value of the slider bar value Set to 1

2、AudioSource How to play it

You can see ,AudioSource There are three ways to play
Play() Member method .
PlayOneShot( Parameters ) Member method .
PlayClipAtPoint(clip,position) Static methods .

3、 establish Audio Mixer

Use Audio Mixer Control the global volume , First, in the Groups Add members under ：Music and SoundEffect（ Game sound ）, Drag the corresponding music to AudioClip after , take Music and SoundEffect Drag onto Audio Source Under components Output in
The hierarchical relationship is shown in the figure below , adopt MasterMixer Of Music To control the volume of background music , adopt SoundEffect To control the volume of the game

4、 Exposure parameters

Need to put Music and SoundEffect Parameter exposure of （Expose） come out , So we can control the volume through the code ：

1. First exposed Master Parameters of ：
   2. And then click Exposed Parameters, Choose what we just exposed Master Parameters of , Press down F2 Change the name to MasterVolume：
   Related scripts ：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Audio;
 
public class AudioManager : MonoBehaviour
{
 
    public AudioMixer audioMixer;    //  controlled Mixer Variable 
 
    public void SetMasterVolume(float volume)    //  A function that controls the main volume 
    {
        audioMixer.SetFloat("MasterVolume", volume);
        // MasterVolume Exposed for us Master Parameters of 
    }
 
    public void SetMusicVolume(float volume)    //  A function that controls the volume of background music 
    {
        audioMixer.SetFloat("MusicVolume", volume);
        // MusicVolume Exposed for us Music Parameters of 
    }
 
    public void SetSoundEffectVolume(float volume)    //  A function that controls the volume of sound effects 
    {
        audioMixer.SetFloat("SoundEffectVolume", volume);
        // SoundEffectVolume Exposed for us SoundEffect Parameters of 
    }
}

5、 Adjust the volume

Set the maximum and minimum values of the slider to solve the problem , Make sure that the sound size range

3、 ... and 、 problem

The original sound effect of the game is that each object is added separately Audio Source, However , Want to use AudioMixer Adjust the , The track of each sound effect needs to correspond to , It can only be exact AudioSource Components , therefore , Static PlayClipAtPoint Method cannot be used by AudioMixer control
resolvent ：
Create an empty object , Hang script , All the code and Clip Centrally manage... In this script , And change the previous playback method , Directly through instance The singleton object calls the corresponding method to play

meanwhile , Use the membership method , Every guarantee has one AudioSource Components , Make sure AudioMixer The volume can be adjusted correctly