解决重复切换State的时候会导致重复播放对应Segment的问题。

修复FadeIn读取了FadeOut参数的问题。
增加Initial Delay功能。
重构AudioScheduler.ConfigureSource() -> SetupSource(), RegisterActiveSound(), StartPlayBack()。
移动长音频相关功能至LongAudio文件夹。

Assets/Scenes/SampleScene.unity

@@ -860,7 +860,7 @@ MonoBehaviour:
         m_Arguments:
           m_ObjectArgument: {fileID: 0}
           m_ObjectArgumentAssemblyTypeName: UnityEngine.Object, UnityEngine
-          m_IntArgument: 48
+          m_IntArgument: 11
           m_FloatArgument: 0
           m_StringArgument: 
           m_BoolArgument: 0
@@ -1070,6 +1070,7 @@ RectTransform:
   m_LocalScale: {x: 0, y: 0, z: 0}
   m_ConstrainProportionsScale: 0
   m_Children:
+  - {fileID: 1987857384}
   - {fileID: 1394234348}
   - {fileID: 1161878326}
   - {fileID: 392790004}
@@ -1396,6 +1397,98 @@ CanvasRenderer:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1798358786}
   m_CullTransparentMesh: 1
+--- !u!1 &1987857383
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
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+  - component: {fileID: 1987857386}
+  - component: {fileID: 1987857385}
+  - component: {fileID: 1987857387}
+  m_Layer: 5
+  m_Name: AudioSystemStatus
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!224 &1987857384
+RectTransform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1987857383}
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children: []
+  m_Father: {fileID: 1667985901}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+  m_AnchorMin: {x: 0, y: 0}
+  m_AnchorMax: {x: 0, y: 0}
+  m_AnchoredPosition: {x: 0, y: 0}
+  m_SizeDelta: {x: 200, y: 300}
+  m_Pivot: {x: 0.5, y: 1}
+--- !u!114 &1987857385
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1987857383}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 5f7201a12d95ffc409449d95f23cf332, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_Material: {fileID: 0}
+  m_Color: {r: 1, g: 1, b: 1, a: 1}
+  m_RaycastTarget: 1
+  m_RaycastPadding: {x: 0, y: 0, z: 0, w: 0}
+  m_Maskable: 1
+  m_OnCullStateChanged:
+    m_PersistentCalls:
+      m_Calls: []
+  m_FontData:
+    m_Font: {fileID: 10102, guid: 0000000000000000e000000000000000, type: 0}
+    m_FontSize: 18
+    m_FontStyle: 0
+    m_BestFit: 0
+    m_MinSize: 1
+    m_MaxSize: 40
+    m_Alignment: 0
+    m_AlignByGeometry: 0
+    m_RichText: 1
+    m_HorizontalOverflow: 0
+    m_VerticalOverflow: 0
+    m_LineSpacing: 1
+  m_Text: Audio System Status
+--- !u!222 &1987857386
+CanvasRenderer:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1987857383}
+  m_CullTransparentMesh: 1
+--- !u!114 &1987857387
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1987857383}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 393e3f1fc2824bcf81260ccf46ce9524, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
 --- !u!1 &2093584669
 GameObject:
   m_ObjectHideFlags: 0