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- Xref: sparky rec.audio:17673 rec.video:15325
- Newsgroups: rec.audio,rec.video
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- From: wlrc@uhura.neoucom.edu (William R. Cruce)
- Subject: Re: Selecting an LD Player
- Message-ID: <1993Jan02.211639.2621@uhura.neoucom.edu>
- Organization: Northeastern Ohio Universities College of Medicine
- References: <shetline-301292233743@128.89.19.85> <1992Dec31.131316.14084@lsican.uucp>
- Date: Sat, 02 Jan 1993 21:16:39 GMT
- Lines: 40
-
- >In article 301292233743@128.89.19.85, shetline@bbn.com (Kerry Shetline) writes:
- >>wlrc@uhura.neoucom.edu (William R. Cruce) wrote:
- >>> In article <1992Dec29.171405.1480@lsican.uucp> michael@Canada.lsil.com writes:
- >>> >
- >>> >[...]Error correcting comes to mind here). If the only "audible" differences
- >>> >between players comes from the DAC portion (plus power supplies, etc), then with
- >>> >an outboard DAC, all CD/LD players should sound identical. Is this a true
- >>> >statement?
- >>>
- >>> No. It is not true. Theta makes a "CD Transport" which is a modified
- >>> Philips LD player [major mod is to correct for 'jitter'in the digital
- >>> output, according to their literature]. Fed into their ~$1000 outboard
- >>> D/A (I forget the model #) it sounds better than a Pioneer CLD-3070
- >>> LD player fed into same. Unfortunately the Philips video is no match
- >>
- >>I haven't heard a Theta unit, so I can't tell you whether or not it
- >>actually sounds better than any other laser disc player. But I do know that
- >>the *reasons given* for it sounding better were completely bogus
- >>techno-hype. The manufacture made claims regarding improved
- >>error-correction and mechanical stability as reasons for a gigantic leap in
- >>audio fidelity. The review I read in Video magazine prompted me to write
- >>this (unpublished) letter:
-
- [...deleted..]
-
- For a detailed discussion of 'digital jitter' as it applies to D/A
- playback from CDs see Robert Harley's article on p.114 of STEREOPHILE
- for January 1993. He summarizes papers presented at the Audio Engineering
- Society and discusses and instrument Stereophile has used to measure
- 'digital jitter.' While it is not the total answer there is some
- correlation with subjective sound differences between D/A converters.
-
- You may disagree on scientific grounds but I think this issue has
- moved out of the realm of 'bogus techno-hype.'
-
-
- --
- The answer is never simple and is always changing.
- William L.R. (Bill) Cruce INTERNET: wlrc@uhura.neoucom.edu
- Neurobiology Dept, NE Ohio U Coll of Med, POB 95, Rootstown, OH 44272
-