vinyl versus digital redux

willewonka and cleeds and others,
1. I am gratified to hear that audiophiles like yourselves with high end equipment cannot discern the difference between vinyl played 'directly' and vinyl converted to hi resolution digital....as has been my experience.
So why does vinyl sound different (I would say very different) from digital without intermediate conversion of a digital signal to vinyl ?
2. Regarding the Nyquist theorem, sampling at the 'Nyquist rate' can capture 100% of the information contained in a sine wave.
But we are talking about digital encoding of that signal, a very different matter.  With one-bit encoding, for example, DSD employs a sampling rate of 64 times the 'Nyquist' frequency, and on up to quadruple that number.
3. So why purchase a lp from, for example. Presto Classical (the British vendor) as opposed to a 24/192 version pf the same album ?
Why don't the 'labels' offer ultra  high end digital conversions of
those lp's....to DSD, DXD, your choice ?
I see huge savings in postage, storage space, and of course ease of playback.
So why ???
Regards to all, 'seventies'.

The answer is that vinyl contains euphonious distortions and artifacts that are accurately captured and passed through a hi-res digital recording. I’m saying this as someone who records vinyl to DSD128, and generally prefers these recordings to HD Tracks hi-res digital downloads of the same material.

I do differ with others insofar as my DSD128 vinyl recordings do not quite equal the vinyl source played entirely in the analog domain. But they are close enough.

@seventies - what I said was - I cannot tell the difference between the vinyl and the digital AS PLAYED & RECORDED on MY system 

Let's not forget the many nuances of musical reproduction...

From a piece of vinyl.
- the details of the master cutting and subsequent pressing
- the sound of te actual cartridge
- the mounting of the cartridge - impacts sound/tone
- VTA - Toe-up or down, changes the sound to suit a person's hearing
- the cables/connectors involved
- the phono stage

From a digital source file.
- how the data is transferred to the DAC
- the cables used
- the abilities of the DAC
- the abilities of the DAC's analogue stage

Even before you posted - I listened to an album that I have in both formats from the record company - the digital download was 16/44 
- from  a "fidelity" perspective, I could NOT hear any difference.

But that is NOT the case with ALL albums
- e.g. for some reason my Peter Gabriel album, SO, sounds much better on vinyl. Again, the cutting/pressing process may account for this.

Some Albums are exquisitely recorded in analogue and then reproduced in digital
- in this case the vinyl has 100% of the signal
- whereas the digital does not really have 100%
- doesn't it stand to reason the vinyl should sound more "complete"?

The Nyquist Rate, whilst providing significant scientific evidence as to why digital should work, does not really factor in everybody's hearing abilities.

The ear is an extremely sensitive "instrument" and is different, person to person - in some cases NOT so sensitive :-)

Also, don't forget the "romantic" allure of vinyl. The pops and crackles that add to the "charm" of older recordings

AND those readable vinyl covers
- you get great artwork, sometimes words and thoughts of the artist
- you may get them on a CD, but you need  microscope to read them
- not very "appealing".

Also, if you attend a live performance - there is crowd & venue noise, artist/band mistakes and ad-libs
- with vinyl there are the pops and crackles to add "COLOR" 
- with digital there is just "perfect music"
- which actually sounds a bit too clinical for many ears..

When I started in this hobby there was no digital
- when it came out I switched - I liked the cleaner sound
- my vinyl rig was not very good and the CD player was much better than the TT
- then I started to improve the analogue rig

Today - I can listen to either - if not for the pops and crackles, they both [provide about the same level of "fidelity" and enjoyment

My older pressings - going back to around 1954 will always sound better on vinyl - complete with pops and crackles.

The newer albums sound great in digital - better dynamics and imaging

The ones in between? - depends on MY mood and whether there is a a glass of scotch in play :-)

One album I have is Annie Lennox singing some oldies
- it has some pops and crackles and it adds to the charm.
- It definitely would NOT sound as nice in digital
- this is album I recorded WITH pops and crackles, as mentioned above
- sounds great anywhere I play it.

No real answer to your post, but hopefully some insight into the more  "human" side of vinyl

Regards - Steve 

Given all the effort involved to make and sequence a recording of an LP, it's worth the added step to first clean the LP and get rid of as many of those clicks and pops as possible.  For me that means ultrasonic cleaning followed by a VPI 16.5.

I have many red-book cd duplicates of my vinyl records. I like to think that my vinyl set-up is pretty good (TNT, all tube phono pre). Generally the digitals can sound as good as the vinyls, but without the usual vinyl artifacts of noise and inner groove distortion. Occasionally the vinyls sound better where sufficient care seems not to have been made in the digital mastering. Given the variations in analog pressings, the digital often has better SQ. It took me some years and some $$ to come to this conclusion. Also, I don’t think it requires better than red-book digital to do as well as vinyl as LPs, generally, do not exceed red-book specs.

IMO the reason that some believe that the digital cannot be as good as the vinyl is that they have expensive vinyl set-ups and think that by buying a DAC with the right chip they are doing justice to digital. Fact is, you have to spend a good bit of cash and take considerable care to know how well digital can do. A bit is not a bit is not a bit.

In digital I think of the bit delivery system, that is what comes before the DAC, as the digital turntable and cartridge. As with analog, it needs to be done well for if it is lost there it can never be recovered. All bits are not equal. I think of the DAC as the phono pre which can only do as well as what its input is. As with a pre, simply putting out an analog signal does not necessarily make for a great pre.