由于采用了SN74CB3Q3257 作为HDMI 音频和ALC5616音频信号选择器，不得不看看spec，spec218页 The SN74CB3Q3257 is a 4-bit 1-of-2 high-speed FET multiplexer/demultiplexer with a single output-enable (OE) input. The select (S) i