Originally Posted by chatanika
If there is no difference in audio quality how come they could pick the difference with 100% accuracy with sound tracks they were familiar with?
There is a difference, it is just so slight that it is impossible for you to detect it without top equipment, and an incredible familiarity with the material.
For example, look at this block...
Having never seen it before, what can you tell me about it? To most people, it probably looks like a red block. However, I just created it, so I am much more familiar with it, and know exactly where and how to look at it to see that it isn't just a red block. It's actually a block with three different colors; pure red (255), one stripe near pure red (254), and another larger stripe that is a darker red (250). So having created it, I can immediately pick out the 250 stripe, but even I can't see the 254 stripe, because I just don't have the right equipment (in this case not my monitor, but my eyes).
So being intimately familiar with the block, I can easily spot the difference between it, and a solid red block. But to someone who has never seen it before, it's just a red block. Thus, this block is "transparent" to a master red block, for most individuals in most situations.
I never said there was no difference in the lossless codecs. If you look at the audio waveforms on a screen, PC software could probably identify the subtle differences. But once you run the signal through a $500 pair of speakers with a $10 crossover built-in, the response of the crossover and speakers alters the original signal anyway, and you probably couldn't see the same difference again, even on a PC screen. Then when you involve the human ear, the waters get even muddier.
Thus the DTS 1.5 Mbs track is transparent to the master. Or, while a difference between the master and transparent track does exist. It is so imperceptible that only those with extraordinary hearing, top of the line equipment, and extreme familiarity with the material can differentiate.