Please help me understand this part of rew user manual - Home Theater Forum and Systems - HomeTheaterShack.com

 
Thread Tools
post #1 of 8 Old 05-16-16, 08:52 AM Thread Starter
New Member
 
Join Date: Feb 2015
Location: France
Posts: 4
Please help me understand this part of rew user manual

Hi,

I have difficulties understanding this part of the manual: page 129 from "the low frequency slope...." till "at the listening position"...
Can someone rephrase it for me in simpler terms.... for a beguinner.
I did my mesurement with the default values and not sure it is correct...
thanks ,
David
jahjahlove is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 05-16-16, 12:18 PM
HTS Senior Moderator
 
Wayne A. Pflughaupt's Avatar
 
Join Date: Apr 2006
Location: Corpus Christi, Texas
Posts: 9,171
Send a message via Yahoo to Wayne A. Pflughaupt
Re: Please help me understand this part of rew user manual


Hey David,

First, welcome to the Forum!

Not sure where you’re going off the rails. A search shows the words “low frequency slope” do not appear in tandem on p. 129, or anywhere else in the manual for that matter.

Regards,
Wayne




To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
|
To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

Wayne A. Pflughaupt is offline  
post #3 of 8 Old 05-17-16, 03:41 AM Thread Starter
New Member
 
Join Date: Feb 2015
Location: France
Posts: 4
Re: Please help me understand this part of rew user manual

Hi,
thanks...
sorry for the confusion... I meant this part:
Attached Thumbnails
Please help me understand this part of rew user manual-rew-manual-extrait.jpg  

jahjahlove is offline  
 
post #4 of 8 Old 05-17-16, 12:56 PM
REW Author
 
JohnM's Avatar
John
 
Join Date: Apr 2006
Location: UK
Posts: 6,707
Re: Please help me understand this part of rew user manual

Those settings have no effect on your measurement. They are used the change the shape of the target curve if you want to have REW calculate filters to make your response match a particular target shape.

LF Slope and LF Cutoff are used to make the lowest frequencies of the target curve roll off in the same way as your speaker or subwoofer does, so that the EQ filters don't try and boost the speaker's lowest frequencies more than it is capable of.

The LF Rise setting is used to add a boost (often called house curve) to the target curve at low frequencies.

The HF Fall setting is used to match the target curve to the measurement's natural roll off at high frequencies, so that EQ does not try to boost the high frequencies excessively.
JohnM is offline  
post #5 of 8 Old 05-17-16, 01:45 PM Thread Starter
New Member
 
Join Date: Feb 2015
Location: France
Posts: 4
Re: Please help me understand this part of rew user manual

hello, thanks.
got it for the slope.... default setting is 1.8 ... I placed 0 as miniDSP advised to start with this....
But why the default settings put LF rise at 100 Hz and LF fall at 20Hz ? are we reading from right to left ?
I am not sure to understand what rise and fall means... I would have assumed LF rise would have been between 20 Hz and 50 Hz depending on the driver and its fall between 700 Hz and 1000 Hz (I test JBL drivers) ... and similarly on a two way speaker HF rise at around 1000 Hz and fall between 10kHz and 20or more kHz depending on the driver (here compression)...
besides if I change in the preferences these values thay are fixed in the equilizer window and come back to the above staed values....

Last edited by jahjahlove; 05-17-16 at 01:54 PM.
jahjahlove is offline  
post #6 of 8 Old 05-17-16, 02:05 PM
REW Author
 
JohnM's Avatar
John
 
Join Date: Apr 2006
Location: UK
Posts: 6,707
Re: Please help me understand this part of rew user manual

The values affect the target curve only. To see what they do, the easiest thing is to change them and watch what happens to the target curve.

The equaliser preferences are the default settings for new measurements. They don't affect any measurements you have already made.
JohnM is offline  
post #7 of 8 Old 05-17-16, 02:08 PM Thread Starter
New Member
 
Join Date: Feb 2015
Location: France
Posts: 4
Re: Please help me understand this part of rew user manual

ok I managed to change them with the arrows... it doesn't work if i type it from the number pad of my keybord...

sorry to insist the LF rise define the bottom end or the upper end of a driver ?
jahjahlove is offline  
post #8 of 8 Old 05-17-16, 02:22 PM
REW Author
 
JohnM's Avatar
John
 
Join Date: Apr 2006
Location: UK
Posts: 6,707
Re: Please help me understand this part of rew user manual

They have nothing to do with drivers, they are the span over which you want to have a rise in the target curve as frequency gets lower. Below the end the level stays constant. If you use a numeric keypad make sure Num Lock is on, or type with the normal keyboard number keys.
JohnM is offline  
Reply

Bookmarks

Tags
manual , part , rew , understand , user

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