音频管理

<AudioList>
<Audio Path="testbackaudio" Name="testbackaudio" Default="True" ></Audio>
</AudioList>

<AudioList>
  <Audio Path="bgm/main_theme" Name="main_theme"></Audio>
  <Audio Path="bgm/battle" Name="battle_theme"></Audio>
</AudioList>

<Speak CharacterID="char_1" Content="战斗要开始了！" AudioPath="voice/battle_start"/>
<ChangeBackAudio>battle_theme</ChangeBackAudio>