time | 时间(以秒为单位)。 |
更改某个已计划播放的声音将结束的时间。注意,根据时间安排,并非所有重新计划的请求都能得到满足。
注意,指定的时间仍然为绝对时间轴上的时间,这意味着声音将在到达该时间时停止,与其开始时间无关。因此,如果您有一段长度为 5 秒的声音并且希望它在时间 T 播放、在 3 秒后停止(即声音的最后 2 秒静音),则需要将结束时间指定为 T+3。该函数在音乐系统中非常有用,它能够解决基于帧的有损编解码器导致的信号不连续问题。
using UnityEngine; using System.Collections;
// While this may seem unnecessarily complicated to do this in the case of uncompressed sounds, you can now use // the SavWav code from https://gist.github.com/2317063 to save the generated clips into new assets, // run the program once with a specified sourceClip and the script will generate "cut1.wav" and "cut2.wav". // These can now be imported into Unity as assets and changed to compressed sounds. // Since psychoacoustic compression severely alters the waveforms and frequency content of sounds and // furthermore operates in a block-based fashion, it would cause very noticeable pops and clicks if we didn't // have the sound data after and before the cut point. By having it, even though we are not playing it, the decoder is "warmed up", // i.e. it has matching frequency content before and after the transition, so at least the // frequency spectrum will be more or less the same before and after the transition and so the click will be less audible // than if we had just cut up the sound without the 0.2s overlap regions. // This method may also be combined with cross-fading in order to further smoothen out any remaining artifacts. [RequireComponent(typeof(AudioSource))] public class ExampleClass : MonoBehaviour { public AudioClip sourceClip; private AudioSource audio1; private AudioSource audio2; private AudioClip cutClip1; private AudioClip cutClip2; private float overlap = 0.2F; private int len1 = 0; private int len2 = 0; void Start() { GameObject child; child = new GameObject("Player1"); child.transform.parent = gameObject.transform; audio1 = child.AddComponent<AudioSource>(); child = new GameObject("Player2"); child.transform.parent = gameObject.transform; audio2 = child.AddComponent<AudioSource>(); int overlapSamples; if (sourceClip != null) { len1 = sourceClip.samples / 2; len2 = sourceClip.samples - len1; overlapSamples = (int)(overlap * sourceClip.frequency); cutClip1 = AudioClip.Create("cut1", len1 + overlapSamples, sourceClip.channels, sourceClip.frequency, false, false); cutClip2 = AudioClip.Create("cut2", len2 + overlapSamples, sourceClip.channels, sourceClip.frequency, false, false); float[] smp1 = new float[(len1 + overlapSamples) * sourceClip.channels]; float[] smp2 = new float[(len2 + overlapSamples) * sourceClip.channels]; sourceClip.GetData(smp1, 0); sourceClip.GetData(smp2, len1 - overlapSamples); cutClip1.SetData(smp1, 0); cutClip2.SetData(smp2, 0); } else { overlapSamples = (int)overlap * cutClip1.frequency; len1 = cutClip1.samples - overlapSamples; len2 = cutClip2.samples - overlapSamples; } }
void OnGUI() { if (GUI.Button(new Rect(10, 50, 230, 40), "Trigger source")) audio1.PlayOneShot(sourceClip);
if (GUI.Button(new Rect(10, 100, 230, 40), "Trigger cut 1")) audio1.PlayOneShot(cutClip1);
if (GUI.Button(new Rect(10, 150, 230, 40), "Trigger cut 2")) audio1.PlayOneShot(cutClip2);
if (GUI.Button(new Rect(10, 200, 230, 40), "Play stitched")) { audio1.clip = cutClip1; audio2.clip = cutClip2; double t0 = AudioSettings.dspTime + 3.0F; double clipTime1 = len1; clipTime1 /= cutClip1.frequency; audio1.PlayScheduled(t0); audio1.SetScheduledEndTime(t0 + clipTime1); Debug.Log("t0 = " + t0 + ", clipTime1 = " + clipTime1 + ", cutClip1.frequency = " + cutClip1.frequency); Debug.Log("cutClip2.frequency = " + cutClip2.frequency + ", samplerate = " + AudioSettings.outputSampleRate); audio2.PlayScheduled(t0 + clipTime1); audio2.time = overlap; } } }
注意:如有可能,请创建包含重叠部分的剪辑,然后对第一个剪辑使用计划的结束时间,对第二个使用 AudioSource.time,以截掉重叠部分,如上例中所示。
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thank you for helping to make the Unity documentation better!
Your feedback has been submitted as a ticket for our documentation team to review.
We are not able to reply to every ticket submitted.