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From: nz@wucs.UUCP (Neal Ziring)
Newsgroups: net.audio
Subject: Re: re dbx vs Dolby C
Message-ID: <1476@wucs.UUCP>
Date: Sun, 2-Mar-86 13:40:33 EST
Article-I.D.: wucs.1476
Posted: Sun Mar  2 13:40:33 1986
Date-Received: Thu, 6-Mar-86 02:00:58 EST
References: <20@npois.UUCP>
Reply-To: nz@wucs.UUCP (Neal Ziring)
Distribution: na
Organization: Washington U. Engineering Computer Lab
Lines: 36
Keywords: dolby noise-reduction tape audio dbx hiss
Summary: I think Dolby C is nicer


	I did some tests just the other day with my Technics tape deck
and BSR equalizer (yes, from DAK, no straight-wire-with-gain flames, please)
to determine which noise reduction works better for me.
I often use the Equalizer to ``improve'' the frequency response of the
tape deck, and I wanted to see how Dolby C and dbx reacted to that, too.
My results were not conclusive, but...

	1. In recording silence, dbx was quieter.

	2. In recording music with quick dynamics changes, the dbx
	   ``breathed'' terribly, worse with the equalization than
	   without it.  Dolby C did not breathe at all, as far as I
	   could tell.

	3. Dolby C seemed to work well with or without equalization.

	4. In taping music with great dynamic range, the dbx gives you
	   a bit of an edge.  I have never saturated a tape when using dbx.

	5. Dolby C is slightly quieter in the very soft passages, I think.
	   It also seems to have a slightly ``different'' sort of hiss.
	   One that I find a little less annoying than the dbx-flavor hiss.

Hope these results are helpful to somebody.  I make most of my tapes with
dolby B anyway, because my car and office equipment have no noise reduction
at all.  Listening to dolby-C or dbx tapes without the appropriate decoding
is irritating.
-- 
...nz@wucs (ECL - we're here to provide superior computing)

	{seismo,ihnp4,cbosgd}!wucs!nz   OR   nz@wucs.UUCP

	"We can fit an infinite number of wires into this !@#!$?* junction box,
		... but we don't do that far in practice"
					London Power Co. Employee.