AudioSource.pitch

描述

音频源的音调。

音调使旋律升高或降低。例如，如果您播放一个音调设置为 1 的音频剪辑，则在剪辑播放时增加音调会使剪辑听起来更高。类似地，将音调降低到小于 1 会使剪辑听起来更低。当资源是音频剪辑时，音调属性被限制在 [-3..3] 范围内。当资源是 AudioRandomContainer 时，音调属性将被忽略，如果它不在 [0.0001..3.0] 范围内，控制台将显示警告。这是因为 AudioRandomContainer 不支持来自音调的反向/暂停播放。在从音频剪辑更改为 AudioRandomContainer 时，此范围之外的任何值都将被限制。

//Attach this script to a GameObject.
//Attach an AudioSource to your GameObject (Click Add Component and go to Audio>Audio Source). Choose an audio clip in the AudioClip field.
//This script sets the pitch of the audio at the start, and then gradually turns it down to 0 as time passes.

using UnityEngine;

//Make sure there is an Audio Source component on the GameObject
[RequireComponent(typeof(AudioSource))]

public class ExampleScript : MonoBehaviour
{
    public int startingPitch = 4;
    public int timeToDecrease = 5;
    AudioSource audioSource;

    void Start()
    {
        //Fetch the AudioSource from the GameObject
        audioSource = GetComponent<AudioSource>();

        //Initialize the pitch
        audioSource.pitch = startingPitch;
    }

    void Update()
    {
        //While the pitch is over 0, decrease it as time passes.
        if (audioSource.pitch > 0)
        {
            audioSource.pitch -= Time.deltaTime * startingPitch / timeToDecrease;
        }
    }
}

另一个示例

using UnityEngine;

// A script that plays your chosen song.  The pitch starts at 1.0.
// You can increase and decrease the pitch and hear the change
// that is made.

public class AudioExample : MonoBehaviour
{
    public float pitchValue = 1.0f;
    public AudioClip mySong;

    private AudioSource audioSource;
    private float low = 0.75f;
    private float high = 1.25f;

    void Awake()
    {
        audioSource = GetComponent<AudioSource>();
        audioSource.clip = mySong;
        audioSource.loop = true;
    }

    void OnGUI()
    {
        pitchValue = GUI.HorizontalSlider(new Rect(25, 75, 100, 30), pitchValue, low, high);
        audioSource.pitch = pitchValue;
    }
}