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Path: utzoo!linus!decvax!cca!ima!inmet!andrew
From: andrew@inmet.UUCP
Newsgroups: net.audio
Subject: Re: Dolby - (nf)
Message-ID: <1544@inmet.UUCP>
Date: Mon, 25-Jun-84 07:59:14 EDT
Article-I.D.: inmet.1544
Posted: Mon Jun 25 07:59:14 1984
Date-Received: Wed, 27-Jun-84 03:15:48 EDT
Lines: 23

#R:mb2c:-25700:inmet:2600087:000:875
inmet!andrew    Jun 25 00:40:00 1984

> Could someone tell me the difference between Dolby B and C...

"Dolby B and C differ in the amount of boost/cut they provide and in its
frequency distribution.  Dolby B operates mainly at high frequencies and
suppresses hiss by a maximum of 10 dB.  Dolby C operates at both middle
and high frequencies and reduces hiss by as much as 20 dB."
					- NAD 6150C owner's manual

> and also how it differs from the Dolby on my old Pioneer CT-F9191.

Anything called just "Dolby" is Dolby B... a throwback to the days when
B was the only system used in consumer audio.

> I am planning to buy a new cassette deck for my car and I want to know
> what effect B or C will have on my older recorded tapes.

You've been using B all along (see above); all C decks incorporate B
capability so that older tapes can be played.
 
Andrew W. Rogers		...{harpo|ihnp4|ima|esquire}!inmet!andrew