"who determines which end result is better? More valid? More accurate? More faithful to the original? And how is that confirmed and validated?"
I contend that this is determined by how close the subject system sounds to the YouTube "line feed" where the disk is recorded directly to YouTube.
And it doesn't matter so much what you listen back on, so long as it is of quality, because you are listening for "differences" and not trying to determine what the subject system actually "sounds" like.
Of course there is no room involved in the line feed, but then any room modifications are a distortion of the original signal. One may prefer this distortion, but that's what it is. And the line feed won't have artifacts like floor bounce, but again, that is a distortion.
So knowing where the "distortions" lie, we are better able to deal with them. But if you don't know of their existence... ![]()

