Unity組件：Audio Source 音頻源

The Audio Source plays back an Audio Clip in the scene. If the Audio Clip is a 3D clip, the source is played back at a given position and will attenuate over distance. The audio can be spread out between speakers (stereo to 7.1) (Spread) and morphed between 3D and 2D (PanLevel). This can be controlled over distance with falloff curves. Also, if the listener is within 1 or multiple Reverb Zones, reverberations is applied to the source. (PRO only) Individual filters can be applied to each audio source for an even richer audio experience. See Audio Effects for more details.

音頻源(Audio Source)在場景中播放音頻剪輯(Audio Clip)。如果音頻剪輯(Audio Clip)是一個3D剪輯，音頻源是在一個給定的位置，并會隨距離衰減這樣的方式進行播放。音頻可以在揚聲器之間傳播（立體聲至7.1）（擴散Spread）和可以在3D和2D（平衡調(diào)整級別PanLevel）之間進行轉(zhuǎn)換。這是可以控制的隨距離衰減曲線。此外，如果偵聽器是在1個或多個混響區(qū)中，回響將會應(yīng)用到音頻源。 （只專業(yè)版可用）單獨的過濾器可以應(yīng)用到每個音頻源，可以得到更豐富的音頻體驗。更多細(xì)節(jié)請參閱音頻效果（Audio Effects）。

The Audio Source gizmo in the Scene View and its settings in the inspector.
音頻源在場景視圖中g(shù)izmo 和 它在檢視面板中的設(shè)置

Properties 屬性

• Audio Clip 音頻剪輯
  Reference to the sound clip file that will be played.
  將被播放的聲音剪輯文件
• Mute 靜音
  If enabled the sound will be playing but muted.
  如果啟用，聲音將被播放，但沒有聲音（靜音）
• Bypass Effects 直通效果
  This Is to quickly "by-pass" filter effects applied to the audio source. An easy way to turn all effects on/off.
  應(yīng)用到音頻源的快速"直通"過濾效果。一個簡單的方法來打開/關(guān)閉所有特效。
• Play On Awake
  喚醒時播放
  If enabled, the sound will start playing the moment the scene launches. If disabled, you need to start it using the Play() command from scripting.
  如果啟用，則聲音會在場景啟動的時候開始播放。如果禁用，則需要從腳本中使用的play()命令來啟動它。
• Loop 循環(huán)
  Enable this to make the Audio Clip loop when it reaches the end.
  啟用這個屬性使音頻剪輯（Audio Clip）在播放結(jié)束后循環(huán) 。
• Priority
  優(yōu)先權(quán)
  Determines the priority of this audio source among all the ones that coexist in the scene. (Priority: 0 = most important. 256 = least important. Default = 128.). Use 0 for music tracks to avoid it getting occasionally swapped out.
  確定場景所有并存的音頻源之間的優(yōu)先權(quán)。（0=最重要的優(yōu)先權(quán)。256 =最不重要。默認(rèn)為128。）。使用0的音樂曲目，以避免偶爾換出。
• Volume 音量
  How loud the sound is at a distance of 1 world unit (1 meter) from the Audio Listener.
  聲音從距離音頻監(jiān)聽器（Audio Listener）1個世界單位（1米）處有多響？
• Pitch 音調(diào)
  Amount of change in pitch due to slowdown/speed up of the Audio Clip. Value 1 is normal playback speed.
  改變音調(diào)（Pitch）值，可以減速/加速音頻剪輯的播放。1是正常播放速度。
• 3D Sound Settings
  3D聲音設(shè)置
  Settings that are applied to the audio source if the is a 3D Sound.
  如果是一個三維的聲音，應(yīng)用到音頻源的設(shè)置
• Pan Level
  平衡調(diào)整級別
  Sets how much the 3d engine has an effect on the audio source.
  設(shè)置多少，3D引擎在音頻源上有效果。
• Spread 擴散
  Sets the spread angle to 3d stereo or multichannel sound in speaker space.
  設(shè)置3D立體聲或者多聲道音響在揚聲器空間的傳播角度。
• Doppler Level
  多普勒級別
  Determines how much doppler effect will be applied to this audio source (if is set to 0, then no effect is applied).
  決定了多少多普勒效應(yīng)將被應(yīng)用到這個音頻信號源（如果設(shè)置為0，就是無效果）。
• Min Distance
  最小距離
  Within the MinDistance, the sound will stay at loudest possible. Outside MinDistance it will begin to attenuate. Increase the MinDistance of a sound to make it 'louder' in a 3d world, and decrease it to make it 'quieter' in a 3d world.
  在最小距離（MinDistance）之內(nèi)，聲音會保持最響亮。 在最小距離（MinDistance）之外，聲音就會開始衰減。增加聲音的最小距離（MinDistance），可以使聲音在3D世界"更響亮"，減少最小距離（MinDistance）可使聲音在一個三維世界"安靜"。
• Max Distance
  最大距離
  The distance where the sound stops attenuating at. Beyond this point it will stay at the volume it would be at MaxDistance units from the listener and will not attenuate any more.
  聲音停止衰減距離。超過這一點，它將在距離偵聽器最大距離（MaxDistance）單位，保持音量，并不會作任何衰減。
• Rolloff Mode
  衰減模式
  How fast the sound fades. The higher the value, the closer the Listener has to be before hearing the sound.(This is determined by a Graph).
  聲音淡出的速度有多快。該值越高，越接近偵聽器最先聽到聲音（這是由圖形決定）。
•     Logarithmic Rolloff
      對數(shù)衰減
  The sound is loud when you are close to the audio source, but when you get away from the object it decreases significantly fast.
  當(dāng)你接近的音頻源，聲音響亮，但是當(dāng)你遠離對象，聲音下降顯著快。
•     Linear Rolloff
      線性衰減
  The more far away from the audio source you go, the less you can hear it.
  越是遠離音頻源的，你可以聽到的聲音越小。
•     Custom Rolloff
      自定義衰減
  The sound from the audio source behaves accordingly to how you set the graph of roll offs.
  根據(jù)你設(shè)置的衰減圖形，來自音頻源的聲音行為。
• 2D Sound Settings
  2D聲音設(shè)置
  Settings that are applied to the audio source if the is a 3D Sound.
  如果是一個二維的聲音，應(yīng)用到音頻源的設(shè)置
• Pan 2D
  2D平衡調(diào)整
  Sets how much the engine has an effect on the audio source.
  設(shè)置多少，引擎在音頻源上有效果。

Types of Rolloff 衰減類型

There are three Rolloff modes: Logarithmic, Linear and Custom Rolloff. The Custom Rolloff can be modified by modifying the volume distance curve as described below. If you try to modify the volume distance function when it is set to Logarithmic or Linear, the type will automatically change to Custom Rolloff.

衰減模式有三種：對數(shù)，線性和自定義衰減。自定義衰減可以修改通過修改音量的距離曲線，如下所述。當(dāng)它被設(shè)置為對數(shù)或線性類型時，如果你修改音量距離函數(shù)，類型將自動更改為自定義衰減。

Rolloff Modes that an audio source can have. 音頻源的衰減模式

Distance Functions 距離函數(shù)

There are several properties of the audio that can be modified as a function of the distance between the audio source and the audio listener.

有音頻的幾個的屬性，作為 音頻源和音頻偵聽器之間的距離的函數(shù)，可以被修改。

Volume: Amplitude(0.0 - 1.0) over distance. 音量：幅度（0.0-1.0）隨距離
Pan: Left(-1.0) to Right(1.0) over distance. 平衡調(diào)整： 左(-1.0)到右(1.0)隨距離
Spread: Angle (degrees 0.0 - 360.0) over distance. 擴散：角度(0.0到360.0度)隨距離
Low-Pass (only if LowPassFilter is attached to the AudioSource): Cutoff Frequency (22000.0-10.0) over distance.
低通（只有當(dāng)?shù)屯�濾波器（LowPassFilter）貼到音頻源（AudioSource）上）: 低通截止頻率（10.0～22000.0hz)隨距離。

Distance functions for Volume, Pan, Spread and Low-Pass audio filter. The current distance to the Audio Listener is marked in the graph.

音量，平衡調(diào)整，擴散和低通音頻濾波器的距離函數(shù)。當(dāng)前到音頻監(jiān)偵聽器的距離在圖中標(biāo)記。

To modify the distance functions, you can edit the curves directly. For more information, see the guide to Editing Curves.

要修改的距離函數(shù)，您可以直接編輯曲線。想了解更多信息，請參閱編輯曲線（Editing Curves）的指南。

Creating Audio Sources 創(chuàng)建音頻源

Audio Sources don't do anything without an assigned Audio Clip. The Clip is the actual sound file that will be played back. The Source is like a controller for starting and stopping playback of that clip, and modifying other audio properties.

沒有分配音頻剪輯的音頻源不會播放任何東西。剪輯是實際的聲音文件，該文件將被播放。音頻源就像是一個控制器，用于啟動和停止播放該剪輯，并修改其他的音頻屬性。

To create a new Audio Source 創(chuàng)建一個新的音頻源：

1. Import your audio files into your Unity Project. These are now Audio Clips.
   導(dǎo)入你的音頻文件到Unity項目。這些都是現(xiàn)在的音頻剪輯。
2. Go to GameObject->Create Empty from the menubar.
   從菜單欄選擇 GameObject->Create Empty
3. With the new GameObject selected, select Component->Audio->Audio Source.
   隨著新的游戲?qū)ο?GameObject) 被選擇，選擇 Component->Audio->Audio Source
4. Assign the Audio Clip property of the Audio Source Component in the Inspector.
   在檢視面板中分配音頻源 (Audio Source)組件的音頻剪輯屬性。

Note: If you want to create an audio source just for one Audio Clip that you have in the Assets folder, you can drag and drop that Audio Clip to the scene view and an Audio Source game object will be created automatically for it.

注意：如果你想創(chuàng)建一個音頻源，只需有一個音頻剪輯（Audio Clip）在你的資源文件夾，你可以拖拽音頻剪輯（Audio Clip）到場景視圖，那么帶有音頻源（Audio Source）的游戲?qū)ο髮⒆詣觿?chuàng)建。

Platform specific details 平臺的具體細(xì)節(jié)