这位来自
computeraudiophile.com 的烧友我喜欢。
他也是“认为”听到了不同播放器的不同音质，但他还是测了一下，方法是把不同Player 的输出记入下来，然后把其中一路反转，用软件相加，其中的不同自然就出现在相加后的波形上，结果是无论你怎样放大，都是NULL。
这说明不同播放器的输出是完全一样的，只是他自己 “thought” ， 它们是不同的。
I could place the ripped file and a master file into my mastering software, synchronize them perfectly, invert the polarity of one file, then listen to the results of the two combined files. (This is called a null test.)
"Yet, folks tell me they hear differences in the applications with just straight playback. I have a number of different "server" apps on my machine and though there have been times I *thought* I heard a difference, further testing has shown me that I can't reliably do so and the apps are in effect, sonically equal - at least to my ears, so far.
I've also used my gear to capture the output from the different apps playing the same file, from a point just ahead of the DAC chip in my converters, then performed null tests on each of the files against the master as well as against each other. In every case, a null was achieved."