Things I don't understand yet about EQing

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Member Since: Aug 17, 2005

Hey guys.

I'm trying to get better at EQing and I keep hearing terms like "rolling off" and "shelf" and all. I don't know if i can do this or what? I need some answers, we need an HRC dictionary :)

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Member
Since: Apr 26, 2002


Oct 08, 2005 03:44 pm

www.homerecordingconnection.com/glossary.php

edit0r
Member
Since: Aug 17, 2004


Oct 08, 2005 07:39 pm

Let me grab my brain... I was up for 26 hours recording yesterday. Thought you should know.

A roll off is the same as A High Pass Filter/Low Cut(HPF)(
http://www.audio.uni-lueneburg.de/seminarwebseiten/digaudio/www/bilder/highpass.gif

) or Low Pass Filter/High Cut(LPF)(
http://www.audio.uni-lueneburg.de/seminarwebseiten/digaudio/www/bilder/lowpass.gif

). A band pass filter (
http://www.shewbox.org/images/bandpass.JPG

) is a combination of the two filters. It cuts the highs and the lows but keeps the mids. They do exactly what they say, Let certain bands of frequencies pass. An HPF/Lo cut rolls the low frequencies off with a slope and vice versa.

High shelves Boost/Cut Above or Below a certain Frequency. There are only two types of Shelf EQ. High and Low. The only controls are Boost/Cut but in parametric EQ's you can also select the Frequency.

Low shelf =
http://www.mackie.com/products/mackietechnology/images/EQLoShelf.gif



High Shelf =
http://www.mackie.com/products/mackietechnology/images/EQHiShelf.gif



A notch filter is a filter which cuts/boosts a narrow band of frequencies and passes all frequencies above and below the band.
http://www.lalena.com/audio/calculator/seriesNotch/graph2.gif

. It will usually be found in Parametric EQ's. It has 3 main controls, Boost/Cut, Selectable Frequency and a "Q" Control. The "Q" controls how Wide or Narrow the filter will be, Or the number of Octaves it will affect. A high Q will be narrow while a Low Q will be wide.


bace135 in the house tonight!
Member
Since: Jan 28, 2003


Oct 10, 2005 12:16 am

ooh, good post Colonel.

edit0r
Member
Since: Aug 17, 2004


Oct 10, 2005 05:58 am

Thanks coolo

Sound Gal - Michelle
Member
Since: Jul 11, 2005


Oct 11, 2005 05:09 am

26 hours... were you doing an overnighter at SAE?
Your decriptions are bang on. I would post a picture to assist, but I don't know how to on this forum...

edit0r
Member
Since: Aug 17, 2004


Oct 11, 2005 05:46 am

I booked the whole of Friday (10 am to 10 pm) in the Classics Studio then had an overnighter till 12 pm the next day.

It was a good experience, but not one to be repeated.

I just stick the link in the reply box. Once posted it lights up for me.

Sound Gal - Michelle
Member
Since: Jul 11, 2005


Oct 11, 2005 06:32 am

cheers Arie, i'll give it a try...


http://www.michelleklaessens.com/pictures/kick_drum_EQ.JPG



This is an example of an EQ on a kick drum channel in adobe audition (cool edit)

There is a low q (not very steep) bell shaped curve boost centred at 97.5 Hz frequency to get the body of the kick drum, and then there is a high pass filter shaped boost, again gentle for pretty much everything above 2000 Hz to get the tap sound you want so the kick drum will stand out...

?cixelsid I mA
Member
Since: Jul 30, 2005


Oct 11, 2005 10:37 am

The colonel seems to have done his homework. Shucks...I just keep turning the knobs till it sounds good. Problem is, what sounds good to me may not sound good to you.

edit0r
Member
Since: Aug 17, 2004


Oct 11, 2005 04:55 pm

I still turn the knobs soundmind, but I know the terminology : )

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