適用於 Adobe® Flash® Platform 的 ActionScript® 3.0 參考
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SoundTransform  - AS3

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如何使用 ActionScript 範例
法律聲明
套件flash.media
類別public final class SoundTransform
繼承SoundTransform Inheritance Object

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9, Flash Lite 4

SoundTransform 類別含有音量和左右相位的屬性。

檢視範例

相關 API 元素



公用屬性
 屬性定義自
 Inheritedconstructor : Object
類別物件的參照或是特定物件實體的建構函數。
Object
  leftToLeft : Number
介於 0 (無) 和 1 (全部) 之間的值,指定要在左邊喇叭中播放左邊輸入的量。
SoundTransform
  leftToRight : Number
介於 0 (無) 和 1 (全部) 之間的值,指定要在右邊喇叭中播放左邊輸入的量。
SoundTransform
  pan : Number
聲音的左至右相位,範圍介於 -1 (完全左平衡) 到 1 (完全右平衡) 之間。
SoundTransform
  rightToLeft : Number
介於 0 (無) 和 1 (全部) 之間的值,指定要在左邊喇叭中播放右邊輸入的量。
SoundTransform
  rightToRight : Number
介於 0 (無) 和 1 (全部) 之間的值,指定要在右邊喇叭中播放右邊輸入的量。
SoundTransform
  volume : Number
音量,範圍介於 0 (靜音) 到 1 (最大音量) 之間。
SoundTransform
公用方法
 方法定義自
  
SoundTransform(vol:Number = 1, panning:Number = 0)
會建立 SoundTransform 物件。
SoundTransform
 Inherited
指出物件是否有已定義的指定屬性。
Object
 Inherited
指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。
Object
 Inherited
指出指定的屬性是否存在,以及是否可列舉。
Object
 Inherited
為迴圈作業設定動態屬性的可用性。
Object
 Inherited
傳回代表此物件的字串,根據地區特定慣例進行格式化。
Object
 Inherited
會傳回指定之物件的字串形式。
Object
 Inherited
會傳回指定之物件的基本值。
Object
屬性詳細資訊

leftToLeft

屬性
leftToLeft:Number

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9, Flash Lite 4

介於 0 (無) 和 1 (全部) 之間的值,指定要在左邊喇叭中播放左邊輸入的量。



實作
    public function get leftToLeft():Number
    public function set leftToLeft(value:Number):void

leftToRight

屬性 
leftToRight:Number

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9, Flash Lite 4

介於 0 (無) 和 1 (全部) 之間的值,指定要在右邊喇叭中播放左邊輸入的量。



實作
    public function get leftToRight():Number
    public function set leftToRight(value:Number):void

pan

屬性 
pan:Number

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9, Flash Lite 4

聲音的左至右相位,範圍介於 -1 (完全左平衡) 到 1 (完全右平衡) 之間。 值為 0 則表示沒有左右相位 (置中平衡)。



實作
    public function get pan():Number
    public function set pan(value:Number):void

rightToLeft

屬性 
rightToLeft:Number

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9, Flash Lite 4

介於 0 (無) 和 1 (全部) 之間的值,指定要在左邊喇叭中播放右邊輸入的量。



實作
    public function get rightToLeft():Number
    public function set rightToLeft(value:Number):void

rightToRight

屬性 
rightToRight:Number

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9, Flash Lite 4

介於 0 (無) 和 1 (全部) 之間的值,指定要在右邊喇叭中播放右邊輸入的量。



實作
    public function get rightToRight():Number
    public function set rightToRight(value:Number):void

volume

屬性 
volume:Number

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9, Flash Lite 4

音量,範圍介於 0 (靜音) 到 1 (最大音量) 之間。



實作
    public function get volume():Number
    public function set volume(value:Number):void
建構函式詳細資料

SoundTransform

()建構函式
public function SoundTransform(vol:Number = 1, panning:Number = 0)

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9, Flash Lite 4

會建立 SoundTransform 物件。

參數
vol:Number (default = 1) — 音量,範圍介於 0 (靜音) 到 1 (最大音量) 之間。
 
panning:Number (default = 0) — 聲音的左至右相位,範圍介於 -1 (完全左平衡) 到 1 (完全右平衡) 之間。 值為 0 則表示沒有左右相位 (置中)。

範例  ( 如何使用本範例 )

在下列範例中,聲音只從右聲道播放,而且音量設定為 50%。

建構函式中會載入聲音,並將它指定給聲道 (channel)。另外,也會建立 SoundTranform 物件 (transform)。 它的第一個引數將音量設定為 50% (範圍是 0.0 到 1.0)。 它的第二個引數則設定左右相位。在這個範例中,左右相位設定為 1.0,表示聲音只會從右喇叭傳出來。為了使這些設定生效,必須將 transform SoundTranform 物件指定給聲道的 souundTransform 屬性。

注意:這個範例只有有限的錯誤處理功能。

package {
    import flash.display.Sprite;
    import flash.net.URLRequest;
    import flash.media.Sound;
    import flash.media.SoundChannel;
    import flash.media.SoundTransform;
    import flash.events.IOErrorEvent;

    public class SoundTransform_constructorExample extends Sprite
    {
        public function SoundTransform_constructorExample() {
            var mySound:Sound = new Sound();
            var url:URLRequest = new URLRequest("mySound.mp3");
            var channel:SoundChannel;
            var transform:SoundTransform = new SoundTransform(0.5, 1.0);

            mySound.load(url);    
            channel = mySound.play();
            channel.soundTransform = transform;

            mySound.addEventListener(IOErrorEvent.IO_ERROR, errorHandler);
        }

        private function errorHandler(errorEvent:IOErrorEvent):void {
            trace("The sound could not be loaded: " + errorEvent.text);
        }
    }
}
SoundTransformExample.as

下列範例會載入並播放 MP3 檔。 當播放 MP3 檔案時,移動滑鼠或是其他使用者輸入裝置;當您在 Stage 上方移動使用者輸入裝置時,音量與平衡會隨之變更。若要執行此範例,請將名為 MySound.mp3 的檔案與 SWF 檔放置於相同的目錄中。
package {
    import flash.display.Sprite;
    import flash.display.StageAlign;
    import flash.display.StageScaleMode;
    import flash.events.*;
    import flash.media.Sound;
    import flash.media.SoundChannel;
    import flash.media.SoundTransform;
    import flash.net.URLRequest;
    import flash.utils.Timer;

    public class SoundTransformExample extends Sprite {
        private var url:String = "MySound.mp3";
        private var soundFactory:Sound;
        private var channel:SoundChannel;
        private var positionTimer:Timer;

        public function SoundTransformExample() {
            stage.align = StageAlign.TOP_LEFT;
            stage.scaleMode = StageScaleMode.NO_SCALE;

            var request:URLRequest = new URLRequest(url);
            soundFactory = new Sound();
            soundFactory.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
            soundFactory.load(request);
            channel = soundFactory.play();
            stage.addEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler);
        }

        private function ioErrorHandler(event:Event):void {
            trace("ioErrorHandler: " + event);
        }

        private function setPan(pan:Number):void {
            trace("setPan: " + pan.toFixed(2));
            var transform:SoundTransform = channel.soundTransform;
            transform.pan = pan;
            channel.soundTransform = transform;
        }

        private function setVolume(volume:Number):void {
            trace("setVolume: " + volume.toFixed(2));
            var transform:SoundTransform = channel.soundTransform;
            transform.volume = volume;
            channel.soundTransform = transform;
        }

        private function mouseMoveHandler(event:MouseEvent):void {
            var halfStage:uint = Math.floor(stage.stageWidth / 2);
            var xPos:uint = event.stageX;
            var yPos:uint = event.stageY;
            var value:Number;
            var pan:Number;

            if (xPos > halfStage) {
                value = xPos / halfStage;
                pan = value - 1;
            } else if (xPos < halfStage) {
                value = (xPos - halfStage) / halfStage;
                pan = value;
            } else {
                pan = 0;
            }

            var volume:Number = 1 - (yPos / stage.stageHeight);

            setVolume(volume);
            setPan(pan);
            
        }
    }
}




[ X ]為什麼顯示英文?
「ActionScript 3.0 參考」的內容是以英文顯示

並非所有「ActionScript 3.0 參考」的內容都翻譯為所有語言。當語言元素未翻譯時,就會以英文顯示。例如,ga.controls.HelpBox 類別並沒有翻譯為任何語言。因此在參考的繁體中文版本中,ga.controls.HelpBox 類別就會以英文顯示。