Path: utzoo!attcan!uunet!seismo!ukma!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!rpi!crdgw1!ge-dab!peora!tarpit!bilver!bill
From: bill@bilver.UUCP (Bill Vermillion)
Newsgroups: sci.electronics
Subject: Re: How to minimize phase shift (& what causes it)?
Keywords: phase, shift, parametric, equalizer
Message-ID: <427@bilver.UUCP>
Date: 27 Sep 89 13:49:32 GMT
References: <5214@merlin.usc.edu>
Reply-To: bill@bilver.UUCP (Bill Vermillion)
Distribution: na
Organization: W. J. Vermillion, Winter Park, FL
Lines: 35

In article <5214@merlin.usc.edu> cyamamot@castor.usc.edu (Cliff Yamamoto) writes:
>Greetings!
>
>I would like some opinions from those who have used parametric equalizers
>before or who know about active filters.
>
>I have a parametric equalizer which I've adjusted using a RTA for my stereo.
>It sounds quite good but it still nags me to know that I may be causing it to
>sound worse due to inappropriate adjustment.
 
After using parametrics in audio studio environments for years I have an
opinion on them, albeit a biased opinion.

I only use parametrics as a tool to help where nothing else would. As I had
mentioned in a previous posting, we had even modified our 27 band speaker eqs
to eliminate some of the circuits, and only used a cut mode.

To properly use a parametric in a speaker equalizing environment, and I gather
that is what you are doing from your posting, you would probably need to use a
scope to set one parametric equal to the other.  You want to treat both side
of the signal EXACTLY the same, otherwise you start ruining the stereo
imaging.  Parametrics are virtually impossible to set up the same way twice.

A good rule to use in eq'ing things is to use cut only, and not boost.  Much
kinder to the ear.  Only boost if ABSOLUTELY neccesary.

The above are my opions only, because I have observed that if you take 3
engineers, and 3 producers, you will come up at least 9 ways of doing things,
each of which will be THE ONLY RIGHT WAY!!!!

:wq

-- 
Bill Vermillion - UUCP: {uiucuxc,hoptoad,petsd}!peora!tarpit!bilver!bill
                      : bill@bilver.UUCP