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发表于 2011-4-2 18:17
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原帖由 yxiao 于 2011-4-2 14:27 发表 
But beginning in the mid-1980s critical listeners reported hearing differences where none should have existed.1 Using observational listening techniques, audiophiles noticed musically significant variations between coaxial and TosLink connections, brands of digital cables, and even in the directionality of digital cables themselves. It was an easy matter to prove that the bitstreams were identical—how could the sound change? If the sound is different then the signals must also be different, but in what way were the signals different? What was this mysterious “X factor” that caused identical digital bitstreams to exhibit an analog-like variability?
但从八十年代中期开始,一些细心的听众开始注意到,他们听到了原本不该存在的音质差异. 音响发烧友们注意到同轴和光纤连接会造成显著的音质差异,并且不同品牌的数字线,甚至数字线的不同接线方向,都引起音质的不同. 很容易验证,不论是什么情况,数字音频流是相同的. 那么怎么可能音质不同呢? 假如听到的声音不同,那音频信号肯定是不同的. 但信号怎么会不同呢? 这个神秘的,造成相同的数字流竟然会出来不同音质的"X因素"是什么呢?
现代科技的开颅手术对原始人看来就是在谋杀
1989
年,世界上最快的CPU的核心频率: 25MHz - 100MHz,这还是核心频率,外围接口的频率不会超过10MHz,上MHz的信号对他们来说就是高速信号了,不小心处理就会出问题
而今天外围接口到10G的信号早就商用了
翻老黄历有意思吗?你怎么不找更早的文章呢?清朝末年的怎么样?
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