Originally Posted by patrickBOOTH
How would we have noticed them though? Maybe there is no combination of 0 and 1 that can reproduce these frequencies. Maybe it is an emotional thing and not scientific, but the fact remains you can hear something different.
Firstly, your whole setup of the experiment was flawed. If you know which source is playing, you're also likely to hear a difference between 320kbps mp3 and lossless or between perfectly fine cables for 20$ and cables for 2000$, or a CDP for 80$ and a high end CDP for 1200$. The human perception is easily influenced.
Secondly, vinyl won't be as accurate, or high fidelity, one-to-one or however you want to call it as CD. The mechanical reading process itself will distort the music. The turntable (for example when you change the pick-up head or so) and the vinyl are all factors that vary and are important, so there'll be lots of variance.
You also mustn't forget that nowadays due to the loudness war, post-processing sometimes kills the whole dynamics of the music. Sometimes, the vinyls have still the "original/dynamic" sound, so there's a difference too, but that's because of the major music labels.