原廠的回覆：
The DAC will accept DSD but not properly, the levels are low and it does not use all of the internal DACs. Long story short is it needs a specific circuit to output properly to the DAC2. We have modified some transports stream via HDMI with I2S via PCM but DSD does not work properly.

Q&A上的說明：
The DAC-2 I2S input is specifically for a balanced I²S signal and will not work with standard HDMI outputs that you will find on electronics such as some TVs, Audio Video Receivers, DVD players, etc. even though they will plug into it. The reason for choosing the HDMI style plug and cable is that it can stream high speed with very little signal degradation and it is simply a great cable design. I²S is beneficial when streaming audio because it carries all of the clocking information and data on separate lines of code rendering it jitter free.

所以機器那個HDMI的孔，僅限於給balanced I²S signal使用，而線材是可以用原廠那條，有支援。這是給一些有I²S輸出的機器來連結用的
而一般的HDMI信號進來，就算用原廠的線，也無法像環繞擴大機那樣可以解碼喔!!!
藍光要聽PCM 請用同軸進來DAC2~


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