HIFI,最大的阻碍就是不敢面对真实的自己。

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HiFi，字面意思就是高保真，但是自己都不是真实的自己，哪来的高保真？

很多烧友，玩HiFi的感受根本不是发自内心，而是都是一些“经过XXXXXX，发生了翻天覆地的变化”。这一类毒文我平时都是，过一眼就直接pass掉了。啥玩意啊，全是统一格式统一模板，毫无新意。听得出就是听得出，听不出就是听不出，有啥丢脸的？皇帝的新装？

HiFi很多人说不科学，是玄学，就是这群人弄得乌烟瘴气。就几个简单的例子吧：
模拟信号发展了多少百年？哪里不科学了？是因为自己心中无科学，才会被那些反HiFi的人喷玄学。就好比N年前。不说N年前了，现在都还是这样。数据线的问题，换线有没有变化，作为带模拟端的电路，信号线怎么会没有变化？但凡事不能没根据。有一些人就做得非常的过火，说他家的电视机，换一条HDMI线，电视画面就变好。真是瞎扯中的极品。电视是数字信号，换线怎么会有变化？怎么可能画面变好？这种荒唐的举动就给其他人嘲笑的空子，编成无数笑话调侃。最后就变成，换线HiFi也没有用。

要弄明白科学原理对吧。数字信号传输靠电平高低，模拟信号传输靠波形。简直是风马牛不相及的事情。好比，你换跟电源线，甚至是换电源！你家的2080TI也不会多跑1分，也不会少跑一分。而模拟端的电源为什么很重要？因为我们靠的是交流电源的波形去模拟输入信号的波形。而不是很多人想象中的，把输入信号直接放大。而波形有变化，声音就有变化，电源的纯净度就非常的重要了。换电源的重要性显而易见，换电源线有无变化也可以从根源上找出原因对吧。要科学不要玄学！

但是又说回来了。由于科技的限制，这些波形微小的变化，仪器不一定测得出来，但人耳却能听得出来。有些人就直接反驳了，你比仪器还灵敏吗？话不是这样说，而是仪器根本没有测试那一方面的能力，人类科技没弄出来。好比，自来水，有时候味道有些不一样，你检测得出来吗？每天指标都一样。同样的宫保鸡丁，为什么有些好吃一点，测得出来吗？并不是仪器不灵敏，而是我们的仪器不能测那种变化。

所以啊。玩HiFi就要敢于面对真实的自己，听得出就是听得出，有就是有，无就是无，没玩过没碰过就不要乱评论，不能人云亦云。反之，有钱的这样玩，会把HiFi弄得乌烟瘴气，没钱的会把自己弄得伤筋动骨。

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HDMI is an analog signal.
In HDMI, a digital bit stream is modulated into an analog signal. Think of WiFi: It might seem digital, but I assure you, the radio signal is an analog waveform. HDMI is not Morse Code; to pack billions of bits per second over each wire, a modulation scheme is used. Bits can most definitely be lost over the cable. This data loss is referred to as Bit Error Rate.
HDMI has a design in which video data is transmitted in three separate twisted pairs: R, G and B, or Y, Cb and Cr. A fourth twisted pair carries a clock signal. What’s interesting about this is that each pixel is comprised of information from all three differential pairs. Because of this, when a bit error occurs, it is nearly impossible to see. For example, in Y Cb Cr, if one bit of Cr is lost, the luminance of the pixel is unchanged, and a small portion of one color component will slightly change. It is almost impossible to see such an error unless the error rate is very large. HDMI cables are required to pass certification testing which requires Bit Error Rates many, many times lower than what the best human eye can perceive under the best possible conditions. But uncertified cables which are manufactured with low quality are “just good enough,” and higher bit error rates can occur.
So as you see, the answer to your question is: DEFINITELY there is a difference between one HDMI cable an another, but you may have difficulty seeing it. If you see sparkles or horizontal lines on your TV, try using a better HDMI cable.