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cd-sacd-analog

post #1 of 6
Thread Starter 
Was doing some thinking. Cd is supposed to be the "full" recording. However, sacd contains more information than cd. Does an analog source- vinyl- contain "all" of the auditory information as it is not a computer file but a different source altogether?
post #2 of 6
The only way to have ""all" of the auditory information" is you must be there live. Also CD is not considered the "full" recording since in most digital recordings (and analog to digital remasters) the Master is at a much higher sampling/bit rate. DSD (SA-CD's format) is rarely used for recording so most SA-CD are conversions from LPCM or from analog Master's.

Analog vs digital is a whole world of debate in and of itself with much weight on the subjective end (and after all your perception is all that matters to you).
post #3 of 6
Thread Starter 
I guess my next question would be if a vinyl album is more capable of containing more of the master mix information than CD?.. SACD?
post #4 of 6
You question is akin to opening a Pandora's Box (and my response will likely trigger it). Vinyl zealots (not meant to be derogatory) can make the tea party look like tax and spend supporters, but....Technically the CD format is superior to LP. Also you are asking "more" but not defining what you mean or want to know. There is NO WAY to make a 100% true quantitative comparison (like which glass contains more liquid) between an analog and a digital recording (apple and oranges) because of the fundamental/technical differences.

Here is just a general idea of CD, DSD (SA-CD) and vinyl and the two spes (Dynamic range and frequency response) that have to most to do with the "content of the sound" they can contain.

Dynamic Range: CD-96db (16bit x 6dB, no noise shaping), DSD-120dB (1bit all noise shaping), LP-<70dB (rumble, motor noise, and other factors usually lower this)
Frequency Response: CD 1Hz-22.05kHz (flat, but an absolute cut off Nyquist filtered), DSD-1Hz-120kHz (flat, usually filtered), LP-20Hz-20kHz (+/-3dB, but can be higher/lower)

For comparison 96/24 (the current gold standard and most used recording/Mastering format)
Dynamic Range: 144dB (24x6, can use some noise shaping to increase)
Frequency Response: 1Hz- 48kHz (flat, but an absolute cut off Nyquist filtered)
Edited by William - 1/13/13 at 5:19am
post #5 of 6
Thread Starter 
Thanks for your detailed response. I wasn't looking to start trouble- I know how these things can get. I'm not an expert by any means (I wasn't even sure if this was the correct place to post my question). After thinking about sacd recordings I had thoughts/questions that weren't clearly defined but your answer helped.
post #6 of 6
The analog recording methods used for LPs have to implement various pre-emphasis techniques to ensure that the best possible transfer of the audio is done, Then the pickup cartridge has to do the reverse to make the sound accurate again. Then you have to use an appropriate phono preamp to detect the tiny voltages produced by the various cartridge designs. And you still get all the clicks and pops from dust, and then the tracks wear down, reducing the high frequencies. frown.gif

Optical audio discs have almost as many problems. There are many audio discs which are loosely called CDs but which are recorded in non-Redbook audio formats -- HDCD, DTS, DAD, DVD-A and SACD are some of them. I've seen a BD-A format mentioned, too. They all provide "better than CD" quality, but only in so far as the bits themselves are concerned.

In any format, though, the quality of the sound depends on the people doing the recording.
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