1. Did you not watch the video posted in post #38 explaining and demonstrating this or did you just not understand it?
2. It can be clearly seen that there is distortion of the waveform peaks (pretty much all the peaks) with vinyl which causes the higher DR reading. Whether that distortion is an unavoidable consequence of the cutting procedure, stylus playback or a combination of both is unclear. It also seems that this unwanted distortion is largely or entirely inaudible.
G
Some posts must have been deleted prior to that one containing the video, because #38 no longer is that post. It's something I posted, that's how I know that.
I found it, it's now #36 'in the stack' so to speak. Yes, I have viewed that video prior to posting on headfi.
I generally regard anything Ian has to say on the matter of loudness with guarded skepticism, as I feel he talks the talk, but does not walk the walk when it comes to fighting the LW. Remember the old Henry Ford joke back when he started mass-producing model Ts? "You can have one in any color you like as long as it's black"
Well, Shepard seemed to be implying the same thing regarding song & album dynamic range a few years back: He happens to make frequent use of DR meters, both realtime and the snapshots produce the results on DR Database. He suggested then that DR8 is enough for most commercially produced pop, dance, hip-hop, rock, and country albums.
After respectfully disagreeing with Ian about that, and after having been told by him one too many times to "Use your ears", I stopped corresponding with him.
As as the reasons for the different DR values returned for the CD vs vinyl release of the same album, I agree with the reasons, but only up to a difference in DR values of 2-3. Beyond that much of a difference, I would attribute it to something additional being done to the CD version, vs what was done for the vinyl. Heavier peak limiting perhaps? Who knows?
There's plenty of 'mastering for vinyl' essays on line where the engineers, in describing the steps, said it themselves: "Leave the final limiter OFF on the copy destined for vinyl".