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PCM2906C S/PDIF_IN的功能如何使用?

Other Parts Discussed in Thread: PCM2906C

S/PDIF_Out输出功能正常,但是S/PDIF_IN的功能不正常,windows电脑可以看到录音设备, 但是录不到音,模拟输入录音是正常的。

有测试从别的EVM板发S/PDIF信号过来,各种采样率等试过, 都录不到, 测量信号已经进到DIN引脚了。 

晶振,电压幅度等都确认过,但是USB就是沒錄到音,

请帮忙看看,是不是还有什么要注意的??

謝謝!