| value | 如果更改是由设备更改引起的，则为 true。 |
每当全局音频设置更改时调用的委托。全局音频设置更改可能由以下原因导致：AudioSettings.Reset 或外部因素更改（例如在系统控制面板中更改了采样率），或默认输出设备发生改变（例如，插入 HDMI 显示器或 USB 头戴式耳机时）。
有关示例，请参阅 AudioSettings.Reset。
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