Path: utzoo!attcan!uunet!cs.utexas.edu!wuarchive!kuhub.cc.ukans.edu!paul
From: paul@kuhub.cc.ukans.edu
Newsgroups: comp.music
Subject: Re: Re^2: dbx vs. Dolby C Noise Reduction
Message-ID: <25015.26ac0d88@kuhub.cc.ukans.edu>
Date: 24 Jul 90 13:57:44 GMT
References: <590@lexicon.com> <1920003@hpcuhc.HP.COM> <6278@gssc.UUCP>
Organization: University of Kansas Academic Computing Services
Lines: 10

> unless it is an all-digital recording.)  I think the improvements can be
> attributed to advances in circuit speed and dividing the frequency spectrum 
> into separate NR bands.

According to dbx literature dbx I uses a different
pre-emphasis/de-emphasis. In addition, dbx II uses the audio spectrum
between approximately 50 Hz- 10 kHz to determine the RMS level of the
signal to compensate for the possible high frequency "drop off" in the
frequency response of cassette recorders and the head-contour effect
on the bass frequencies of most cassette recorders.