This turned out to be caused by our on-board Realtek sound controller being disabled.
这看样子是由于我们的板载Realtek 声卡被禁用了。
The circuit is applied to control of the car's sound controller of SIEMENS CD723 and TV and DVD devices, and the effect is good.
用该电路对西门子CD 723汽车音响控制器、车载电视及DVD等设备进行控制，功能强，效果好。
The circuit is applied to control of the car's sound controller of SIEMENS CD723 and TV and DVD devices, and the effect is good.
用该电路对西门子CD 723汽车音响控制器、车载电视及DVD等设备进行控制，功能强，效果好。
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