我想驗證i.MX6 DL板上的揚聲器功能是否正常。 HDMI連接器有一個hot_plug來檢測HDMI線是否插好， 在GUI界面下用IMX播放器測試，有沒有辦法切換到揚聲器播放聲音？
不過在命令行下用aplay播放wav格式的音樂是沒有問題的。
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