rePhase, a loudspeaker phase linearization, EQ and FIR filtering tool - Page 18 - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 1st January 2013, 08:04 PM   #171
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
I don't have REW. What can I show you in HOLM or rePhase?
  Reply With Quote
Old 1st January 2013, 08:10 PM   #172
diyAudio Member
 
Join Date: Jan 2006
Location: grenoble
impulse of correction in HOLM

it's must start slowly and finish at a maximum at t=0.
can you show the magnified impulse ?

resulting impulse is a symetrical one when you convolve by hand (C=AxB)

Last edited by thierry38efd; 1st January 2013 at 08:13 PM.
  Reply With Quote
Old 1st January 2013, 08:20 PM   #173
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
I spoke too soon. I do have REW, but can't find the GD display. I'll show you the rePhase impulse in HOLM.
Attached Images
File Type: png rephase-impulse.png (32.7 KB, 176 views)
  Reply With Quote
Old 1st January 2013, 08:27 PM   #174
diyAudio Member
 
Join Date: Jan 2006
Location: grenoble
it's seems to be Ok.

check for last version of REW.(5.01)
  Reply With Quote
Old 1st January 2013, 08:31 PM   #175
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
Will do, thanks.

So you do think this impulse when convolved will correct phase only of my woofer response?
That seems to be what I'm seeing, but could be wrong.
  Reply With Quote
Old 1st January 2013, 08:41 PM   #176
diyAudio Member
 
Join Date: Jan 2006
Location: grenoble
Quote:
So you do think this impulse when convolved will correct phase only of my woofer response?
That seems to be what I'm seeing, but could be wrong.
you're right,only in the lows and for the bass reflex delay.(picture below )
a simple way is to do a 4 feets mic measurement of loudspeaker,extract excess delay,and applied theoritical phase linearizationn for full range.

here's your correction (bass reflex 37 Hz)
Click the image to open in full size.
  Reply With Quote
Old 1st January 2013, 10:22 PM   #177
diyAudio Member
 
john k...'s Avatar
 
Join Date: Aug 2004
Location: US
Quote:
Originally Posted by Pano View Post
I don't know John. I just exported the impulse wave from rePhase and plugged it into my player software - JRiver Media Center. I could be that it's upside down, I don't know. Will try to figure it out. I either have convolution turned on or turned off, if that's what you mean.
If you turn the convolution turned on and off I don't think it's a valid comparison. What you need to do is keep the convolution on all the time and change the impluse being processed.
__________________
John k.... Music and Design NaO Dipole Loudspeakers.
  Reply With Quote
Old 1st January 2013, 10:36 PM   #178
diyAudio Member
 
Join Date: Nov 2011
Location: Cooktown, Oz
Quote:
Originally Posted by john k... View Post
If you turn the convolution turned on and off I don't think it's a valid comparison. What you need to do is keep the convolution on all the time and change the impulse being processed.
Why is that John?
  Reply With Quote
Old 1st January 2013, 10:36 PM   #179
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
OK, but if it's a "perfect impulse" (1 sample on, all others off) it should do nothing, right?
I'll try it.
  Reply With Quote
Old 1st January 2013, 10:51 PM   #180
diyAudio Member
 
john k...'s Avatar
 
Join Date: Aug 2004
Location: US
Quote:
Originally Posted by Pano View Post
OK, but if it's a "perfect impulse" (1 sample on, all others off) it should do nothing, right?
I'll try it.
Why? Because you don't know what the effect of the convolution engine is. Yes a perfect impulse should do nothing but which is why it's a good check on whether the convolution engine introduces any artifacts of its own.
__________________
John k.... Music and Design NaO Dipole Loudspeakers.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
FIR linear phase plugin for MiniDSP? diyjb01 miniDSP 13 7th February 2014 01:24 AM
FIR filter design tool for Loudspeaker magnitude equalization ttmusic Software Tools 3 24th May 2013 08:30 PM
FIR Filtering experiences Olombo PC Based 8 10th February 2013 03:45 PM
AVX based FIR VST, crossover / EQ / DRC and delay KOON3876 PC Based 97 26th November 2012 07:18 AM
Phase EQ using FIR filters Grasso Multi-Way 2 2nd July 2003 10:37 PM


New To Site? Need Help?

All times are GMT. The time now is 09:34 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2