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- From: Jonas.Palm@orgk3.lu.se (Jonas Palm)
- Subject: Re: Dolby S vs. DCC etc.
- Message-ID: <Jonas.Palm-280193111530@fastpath-39.orgk2.lth.se>
- Followup-To: rec.audio
- Sender: news@pollux.lu.se (Owner of news files)
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- Organization: University of Lund, Sweden
- References: <C1HGp9.Jy7@acsu.buffalo.edu> <1993Jan27.201538.22693@viewlogic.com>
- Date: Thu, 28 Jan 1993 10:23:46 GMT
- Lines: 40
-
- In article <1993Jan27.201538.22693@viewlogic.com>,
- bobdavis@scumbag.viewlogic.com (Bob Davis) wrote:
- > Comparisons between Dolby S and DCC and MD must take the particular
- > decks and/or electronics into consideration. While these NR &
- > compresssion techniques will tend to have certain effects, the other
- > sonic attributes of particular cassette decks or MD/DCC decks will
- > possibly make a much larger difference.
- >
- > One big problem, which I've had with all but the ultra expensive cassette
- > decks, is flutter and speed stability in general. Dobly S isn't going
- > to make a wit of difference there.
- > ....
-
- As a matter of fact.... Oh yes it will! (or is that does?)
- At the moment, Dolby-S circuits are expensive and therefore only shows
- up on the best decks, with good to excellent transports.
- Even if this wasn't the case, Dolby requires certain performance levels
- to be met by the tape deck if it is to use Dolby-S.
- Azimuth angles, transport stability, noise levels, overload margins of
- electronics are all examples where certain criteria that must be met.
-
- Furthermore there is one user interface feature that must be present:
- The user _has_ to be able to adjust bias and recording sensitivity for
- a given tape, manually or automatically.
-
- Thus Dolby-S in the cassette market is not just a noise reduction scheme.
- It ensures that the basic performance level of the deck is reasonable.
- It tries to ensure transferability of recordings (the azimuth requirement).
- It makes sure that the user can calibrate the tape deck to the tape used
- and thereby avoid Dolby mistracking.
-
- Unfortunately, Sony produces the Dolby-S circuits, and I find it difficult
- to imagine that they are particularly interested in pushing up volume and
- down price. They have interests elsewhere.
-
- Whatever the reason, the relative expense of Dolby-S (vs C) makes it a
- high-end item at present. No crummy transports there.
- Most are very good.
-
- Jonas Palm
-