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在DAP的input mixer,经过地址为2A的BQ后，另外一端发的数据输入没有来源，不知道这个数据来自哪里，谢谢
是不是数据发送里的问题呢
不是这个意思，我问的是原理，看图里面有个信号的输入端没有明确接到哪里？
