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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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In Reply to: RE: I think I have some familiarity with the CD system.... posted by 13th Duke of Wymbourne on March 21, 2021 at 11:32:17:
Thanks for the thoughtful comment.
Sorry for not being clear enough, yes, "kludge" was re: S/PDIF+cables. Digital cabling being coaxial 75-Ohm with BNC connectors was another heritage of Sony analog color-TV technology.
The problem I see there is that because the receiving device (in this era, usually a separate DAC) has to infer the timing from the zero-axis crossings, the actual length of the cable, as in, 56.5 inches vs. 60.5 inches, makes a difference in the robustness of the data stream.
BTW, your comment and the immediately above might be the reason that some very experienced listeners claim that the best CD playback they have ever heard was from cost-no-object one-box players, such as Gryphon's "moon-shot" player. Makes sense to me.
BTW, I am not an engineer. I studied translating French love poetry into English love poetry under the Poet in Residence at Brown. Among other things.
I would have to dig up some paperwork, but my recollection is that when Pre-Master CDs came out, the Sonic Solutions documentation that came with the PMCD included a log of error corrections. That stuff has been in boxes here for more than 20 years.
I am aware of the Reed-Solomon interleaving data-protection scheme, and I don't think that Sonic Solutions counted that as errors.
As far as substrates go, the theory was that a floppier, less rigid substrate (but not a rubbery pancake type thing) would resonate less and have greater self-damping if it or the transport were slightly eccentric or out of round or not of uniform density.
I do agree that the CD system was a feat of engineering. I just wanted to point out forcefully that commercial convenience meant that the recording end, as distinct from the playback end, took advantage of an installed base of expensive gear, rather than making customers buy new expensive gear. Very clever.
I caught the grin icon about vonK. The story I heard was that the President of Sony wanted LvB's Ninth on one CD. Again, very clever to choose a rate that was compatible with two different video systems.
jm
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Follow Ups
- Sorry for not being clear enough, yes, "kludge" was re: S/PDIF+cables - John Marks 05:45:44 03/22/21 (1)
- RE: Sorry for not being clear enough, yes, "kludge" was re: S/PDIF+cables - 13th Duke of Wymbourne 16:52:01 03/22/21 (0)
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