Mike Walker
Doesn't pull punches
- Joined
- Jun 25, 2001
- Posts
- 541
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- 14
The masters WERE prepared differently, at least at some point, between the SACD and redbook layers...BECAUSE the technology is NOT interchangable!
I believe that simply believing that SACD is capable of better quality is enough to influence Bob Ludwig (or anyone else) to "make it so" (to quote Jean-Luc Picard). A slight bit of hf eq on the Redbook master (to make up for the earlier rolloff of 44.1khz sampling), or a slight reduction (or increase in) bass level on the redbook layer to compensate for the anticipated lack of a dedicated subwoofer channel when playing two channel stereo audio (AND OF COURSE THIS HAPPENS!) is all that it would take to make SACD and redbook layers sound quite noticably different, when in fact they were capable of sounding much more alike!
Mastering engineers are human beings. Human beings are loaded with biases. Among the best known biases of today's mastering engineers is their love affair with the new "high rez" formats which, in many cases, began before they had even heard them! Because mastering is at least as much art as science (perhaps more), those who do it often think more like artists than scientists, which means (in my opinion) they are less qualified to make scientifically significant comparisons than would someone who perhaps doesn't even work in the audio industry, but has a logical mind, and love of statistical methodology.
One does not, and never will be able to decide if SACD or Redbook sound better, or even different, using material which was mastered to sound it's "best" in both formats by someone who believes one to be intrinsically superior. Better to take a "neutral" source (such as a very high quality analog tape), and record to both formats simultaneously with matched levels, and no equalization or other tinkering. Then synchronize the playback of the recordings in both formats, and use an a/b/x technique to quiz a listening panel about whether source x is the same as source a or b (with a being sacd, for instance, b being redbook, and x being either a or b chosen randomly). One SHOULD NOT ask which sounds better, because if the listeners can't tell if x is a or b, they have proven they hear no difference! The listeners SHOULD NOT know what they are comparing (whether it's two cd players playing the same recording, two formats, analog vs digital, or if through speakers whether they're comparing speakers or amplifiers). Again what's "better" is beside the point. If one can't reliably and repeatedly tell whether source "x" is a or b, they they HEARD NO DIFFERENCE!
Even with the above technique, there is one variable which I don't know how to eliminate. Conversion technology! A/D and D/A converters for SACD (dsd) and PCM (redbook) are such entirely different beasts that I don't know how one can be sure that differences are the result of superiority of one format over another, or simply the quality of the converters.
See what I mean? Arriving at truly meaningful answers is VERY difficult. To do so, those of us who really want to know the truth (if a format is audibly superior, or even different under properly controlled circumstances with matched levels and the same number of reproduced channels) MUST BE SKEPTICAL OF ANY AND ALL CLAIMS UNTIL THEY ARE PROVEN!
Recent advances in PCM converter technology have indicated that oversampling conventional cds at a very high rate can improve their perceived quality. Many think this improvement brings these conventionally prepared recordings into the same quality league as the new "high rez" formats. Perhaps simply moving alias/sampling effects still higher above the audio band, and consequently reducing phase and amplitude "ripple" within the range of human hearing is enough. If this is true, then replacing our current library of music in yet another format (and accepting the record companies' restrictions on our fair-use rights, as well as audibly consequential copy-protection schemes) is unnecessary! How ironic that the best turntables, phono cartridges, and tonearms in history have been introduced since the vast majority of the world's population put the black vinyl in storage forever! Perhaps it's destiny that the pinnacle of redbook cd reproduction will be reached a decade after most stores have stopped selling the damn things! Admittedly that's not likely (imho the cd is FAR from dead!), but still an intriguing thought!
Bye all (for now). I'll be gone a few days. My wife and I are celebrating our 25th wedding anniversary with a trip!
I believe that simply believing that SACD is capable of better quality is enough to influence Bob Ludwig (or anyone else) to "make it so" (to quote Jean-Luc Picard). A slight bit of hf eq on the Redbook master (to make up for the earlier rolloff of 44.1khz sampling), or a slight reduction (or increase in) bass level on the redbook layer to compensate for the anticipated lack of a dedicated subwoofer channel when playing two channel stereo audio (AND OF COURSE THIS HAPPENS!) is all that it would take to make SACD and redbook layers sound quite noticably different, when in fact they were capable of sounding much more alike!
Mastering engineers are human beings. Human beings are loaded with biases. Among the best known biases of today's mastering engineers is their love affair with the new "high rez" formats which, in many cases, began before they had even heard them! Because mastering is at least as much art as science (perhaps more), those who do it often think more like artists than scientists, which means (in my opinion) they are less qualified to make scientifically significant comparisons than would someone who perhaps doesn't even work in the audio industry, but has a logical mind, and love of statistical methodology.
One does not, and never will be able to decide if SACD or Redbook sound better, or even different, using material which was mastered to sound it's "best" in both formats by someone who believes one to be intrinsically superior. Better to take a "neutral" source (such as a very high quality analog tape), and record to both formats simultaneously with matched levels, and no equalization or other tinkering. Then synchronize the playback of the recordings in both formats, and use an a/b/x technique to quiz a listening panel about whether source x is the same as source a or b (with a being sacd, for instance, b being redbook, and x being either a or b chosen randomly). One SHOULD NOT ask which sounds better, because if the listeners can't tell if x is a or b, they have proven they hear no difference! The listeners SHOULD NOT know what they are comparing (whether it's two cd players playing the same recording, two formats, analog vs digital, or if through speakers whether they're comparing speakers or amplifiers). Again what's "better" is beside the point. If one can't reliably and repeatedly tell whether source "x" is a or b, they they HEARD NO DIFFERENCE!
Even with the above technique, there is one variable which I don't know how to eliminate. Conversion technology! A/D and D/A converters for SACD (dsd) and PCM (redbook) are such entirely different beasts that I don't know how one can be sure that differences are the result of superiority of one format over another, or simply the quality of the converters.
See what I mean? Arriving at truly meaningful answers is VERY difficult. To do so, those of us who really want to know the truth (if a format is audibly superior, or even different under properly controlled circumstances with matched levels and the same number of reproduced channels) MUST BE SKEPTICAL OF ANY AND ALL CLAIMS UNTIL THEY ARE PROVEN!
Recent advances in PCM converter technology have indicated that oversampling conventional cds at a very high rate can improve their perceived quality. Many think this improvement brings these conventionally prepared recordings into the same quality league as the new "high rez" formats. Perhaps simply moving alias/sampling effects still higher above the audio band, and consequently reducing phase and amplitude "ripple" within the range of human hearing is enough. If this is true, then replacing our current library of music in yet another format (and accepting the record companies' restrictions on our fair-use rights, as well as audibly consequential copy-protection schemes) is unnecessary! How ironic that the best turntables, phono cartridges, and tonearms in history have been introduced since the vast majority of the world's population put the black vinyl in storage forever! Perhaps it's destiny that the pinnacle of redbook cd reproduction will be reached a decade after most stores have stopped selling the damn things! Admittedly that's not likely (imho the cd is FAR from dead!), but still an intriguing thought!
Bye all (for now). I'll be gone a few days. My wife and I are celebrating our 25th wedding anniversary with a trip!