Help understanding REW Auto EQ Algorithm - Home Theater Forum and Systems - HomeTheaterShack.com

 
Thread Tools
post #1 of 2 Old 08-07-14, 08:46 AM Thread Starter
New Member
 
Join Date: Apr 2013
Posts: 1
Help understanding REW Auto EQ Algorithm

I am using REW to help tune my bi-amped JBL horn setup. I have a MiniDSP 2x4 so have the options to use up to 6 Bi-Quads.

I am getting as far as running the "Match Response to Target" but I am just trying to understand how REW is picking the center frequencies, Qs and amplitudes of the 6 filters.

Here for example is the measured and combined and the filter chosen. On the plot the traces of the filters of the plot are positive gain, but I see they are negative on the EQs panel -- so I get that.

I'm just trying to understand the process by which REW deciders on which frequencies to target for a filter and how the Q is decided. (I do understand that the gains and frequency range are dictated by the choices I've made it the filter tasks tab).

Anyways thanks in advance.
Attached Thumbnails
Help understanding REW Auto EQ Algorithm-req-autoeq1.jpg  

Help understanding REW Auto EQ Algorithm-screen-shot-2014-08-07-6.40.58-am.png  

danvprod is offline  
Sponsored Links
Advertisement
 
post #2 of 2 Old 08-07-14, 01:44 PM
REW Author
 
JohnM's Avatar
John
 
Join Date: Apr 2006
Location: UK
Posts: 6,707
Re: Help understanding REW Auto EQ Algorithm

You can choose whether or not the filters are drawn inverted using the check box in the graph controls. When inverted it is easier to see how they match to the response (which is best left unsmoothed for low frequencies, REW ignores smoothing below 200 Hz).

The basic process is to find the biggest area crated by the intersection of the response and the target, apply a filter there, optimise the filter settings to minimise the deviation from the target, then repeat until it runs out of filters to assign or areas big enough to be worth correcting.
JohnM is offline  
Reply

Bookmarks

Tags
algorithm , auto , eq , rew , understanding

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome