Alex, -- "takes a great deal of effort to approach analog quality with digital" -- yes, I agree, it is simply easier to get pleasant sound from a TT than frequently the typical at home CD setup. But that is not the fault of the CD medium itself, but IS the fault of the CD playback mechanism. Simply put, it is injecting too much unpleasant distortion directly into the signal, AND adversely affecting the following amplifier stages. Subtle distortion, yes, but very unpleasant.
So, again, I emphasise, it is at the actual moment that the digital recording is being played, running through the DAC when the damage is done. Let's consider those tests you did:
1) Vinyl to top line AKM ADC encoded at 192/24: Recording 24
1) Same vinyl to top line AKM ADC encoded at 44.1/16: Recording 16
Now, from my point of view, Recording 16 is effectively the same quality as Recording 24, assuming the AKM device is top line as you say.
Now let's play them back -- for argument's sake in a SACD player. Oh dear, Recording 24 is much better than Recording 16! You would say, just what I expected. But I would say, what's happening is that the mechanism in the SACD player is much better at its job of playing back Recording 24 than it is of Recording 16; in other words, at the point of playback more "nasty" distortion is being generated directly and indirectly by the SACD player when ACTUALLY PLAYING 44.1/16 material than when PLAYING 192/24 material, even if it is of the same original audio!
So, in simple terms, the CD sound is lousy because the CD playback is not working properly, or at least not as well as the SACD playback ...
Frank
So, again, I emphasise, it is at the actual moment that the digital recording is being played, running through the DAC when the damage is done. Let's consider those tests you did:
1) Vinyl to top line AKM ADC encoded at 192/24: Recording 24
1) Same vinyl to top line AKM ADC encoded at 44.1/16: Recording 16
Now, from my point of view, Recording 16 is effectively the same quality as Recording 24, assuming the AKM device is top line as you say.
Now let's play them back -- for argument's sake in a SACD player. Oh dear, Recording 24 is much better than Recording 16! You would say, just what I expected. But I would say, what's happening is that the mechanism in the SACD player is much better at its job of playing back Recording 24 than it is of Recording 16; in other words, at the point of playback more "nasty" distortion is being generated directly and indirectly by the SACD player when ACTUALLY PLAYING 44.1/16 material than when PLAYING 192/24 material, even if it is of the same original audio!
So, in simple terms, the CD sound is lousy because the CD playback is not working properly, or at least not as well as the SACD playback ...
Frank