AudioSource.volume

# [AudioSource](https://docs.unity3d.com/cn/2019.4/ScriptReference/AudioSource.html).volume

public float **volume** ;

## 描述

音频源的音量（0.0 到 1.0）。

AudioSource 的音量属性控制来自 AudioClip 的声音级别。最高音量等级为 1，最低音量为 0（此时听不到声音）。

```
using UnityEngine;

public class Example : MonoBehaviour
{
    AudioSource m_MyAudioSource;
    //Value from the slider, and it converts to volume level
    float m_MySliderValue;

void Start()
    {
        //Initiate the Slider value to half way
        m_MySliderValue = 0.5f;
        //Fetch the AudioSource from the GameObject
        m_MyAudioSource = GetComponent<AudioSource>();
        //Play the AudioClip attached to the AudioSource on startup
        m_MyAudioSource.Play();
    }

void OnGUI()
    {
        //Create a horizontal Slider that controls volume levels. Its highest value is 1 and lowest is 0
        m_MySliderValue = GUI.HorizontalSlider(new Rect(25, 25, 200, 60), m_MySliderValue, 0.0F, 1.0F);
        //Makes the volume of the Audio match the Slider value
        m_MyAudioSource.volume = m_MySliderValue;
    }
}
```