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Linear Phase EQ shootout!!! Equalizer Plugins
Old 24th March 2010
  #1
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Jantex's Avatar
 

Linear Phase EQ shootout!!!

These 6 files are processed with 6 different EQs, where 5 of them are Linear Phase and one isn't. So you'll have to choose your favorite between these 6 EQs:

-Tracks 3 EQ (lin phase enabled)
-Sonnox EQ
-EQuality (lin. phase enabled)
-PLPar EQ (lin. phase - higherst qualiti)
-Fabfilter Pro-Q (lin. phase - highest quality)
-DDMF LP 10 (lin. phase enabled)

We are comparing high shelf at 2751 Hz, Q=0-71 (with few of the EQ's I had to match it with analyzer and ear, because the numers weren't representative), and gain=7,4dB.

Which one do you like the most? Can you guess which is which? heh

DL link: EQ.rar
Old 24th March 2010
  #2
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I have to admit I didn't expect such differences among these digital EQs and don't I think they provide placebo effect with different GUIs.
Old 24th March 2010
  #3
EQ file 6 has an interesting crackling. that might be the non-linearphase eq hehhehhehheh
Old 24th March 2010
  #4
Gear Maniac
 

I liked #5
Old 24th March 2010
  #5
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Quote:
Originally Posted by Jantex View Post
I have to admit I didn't expect such differences among these digital EQs and don't I think they provide placebo effect with different GUIs.
I may add that right now I'm not so sure about this as I recently been testing few highly liked eq plugins against the digi rack eq 3 and im not hearing the differences. i'm conducting a test the waves ssl g-channel against the nomad analog trackbox check it out. the next one is going to be the ssl eq, waves ren eq vs digi rack eq.
Old 24th March 2010
  #6
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If the crackling occured it was due to the plugin instability. I didn't check the exports, because it was quite late. But 6 definitely has problem with stability when in linear phase.
Old 24th March 2010
  #7
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Question

t-racks 3 eq was the yellow or the silver eq?

dry files are included?

others can help with...
izotope ozone 4 digital eq.
sonictimeworks.com LP eq
waves mastering lp eq
crysoniq cryq semi-linear phase eq
algorithmix red & orange
...

the source file isnt the best.
testing only shelf isnt enough.

LP EQs sound different with diferent sources...
try better source file... hq dynamic.
there are many in gearslutz shootouts.

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Quote:
Originally Posted by Jantex View Post
These 6 files are processed with 6 different EQs, where 5 of them are Linear Phase and one isn't. So you'll have to choose your favorite between these 6 EQs:

-Tracks 3 EQ (lin phase enabled)
-Sonnox EQ
-EQuality (lin. phase enabled)
-PLPar EQ (lin. phase - higherst qualiti)
-Fabfilter Pro-Q (lin. phase - highest quality)
-DDMF LP 10 (lin. phase enabled)

We are comparing high shelf at 2751 Hz, Q=0-71 (with few of the EQ's I had to match it with analyzer and ear, because the numers weren't representative), and gain=7,4dB.

Which one do you like the most? Can you guess which is which? heh

DL link: EQ.rar
Old 7th April 2010
  #8
Gear Head
 

I think I like 4 the best...then 5 and 2. So, which is which?
Old 9th April 2010
  #9
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Will post the results today afternoon. There wasn't much response in this thread
Old 9th April 2010
  #10
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Results are:
EQ1 - Fabfilter Pro-Q
EQ2 - PLPar EQ
EQ3 - EQuality
EQ4 - Oxford EQ
EQ5 - DDMF LP10
EQ6 - Tracks 3 LP EQ
Old 9th April 2010
  #11
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fantomen's Avatar
 

I had chosen 3 & 4 before looking, happily its the 2 ones that I have, so no need to purchase another plugin
Old 15th June 2010
  #12
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I chose 3 and 4 as the least natural sounding as they had a brighter high end (around 8-10khz I guess). I thought one of those must have been the non-linear-phase.

I thought 1, 2 and 5 sounded 'best' and most natural (even though we didn't really have an original to compare to), although I thought 1 could have been very slightly duller. 6 was crackly and I couldn't really determine the sound character because of that. I chose 5 as 'best'.

Before this test I checked out EQuality and wasn't that impressed, especially not with the linear phase mode (it sounds very un-linear phase like to me). I don't really care about the Sonnox EQ either.

I have Fabfilter Pro Q and loved the demo of PlPar when I tried it, but can't afford it and I'm on mac. Would be good to have heard Nugen SEQ1 and Algorithmix Red in this test.

Really pleased that the LP10 is so similar to the PlPar as I also have that and was in two minds about it.

Cheers!
Old 15th June 2010
  #13
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I completely agree with you, you probably heard the same things as I did. The difference in neutrality of the sound amont these plugins is quite easily noticable. EQuality's linear phase mode is really bad compared to the others.

PLPar and DDMF are really close. Cnsidering the price of the PLPar, DDMF is a steal of the century. The one I also love PSP Neon HR. With FAT on it is simply magical and is the one I use the most. I haven't decided for PLPar in the end, because soundwise it can be 99% matched with DDMF.
Old 15th June 2010
  #14
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Will do a more comprehensive test with LP EQs on Thursday. I'll include Waves LP, PSP Neon HR, PLPar EQ, DDMF LP10, Equality, Fabfilter and T-racks. I'll also include unprocessed files so anybody could process them with some other EQ I don't have access to.
Old 15th June 2010
  #15
it's great to see the LP10 do so well! IIEQpro is nice as well!
Old 15th June 2010
  #16
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Hi Jantex,

I always knew LP10 was very transparent but started using others in its place as the low CPU made me think it couldn't be running at very high quality compared to others. Might have to rethink my logic now!

Out of interest, was the PlPar you used the full version running at highest quality (7)?

Cheers
Old 15th June 2010
  #17
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Hi Robo, yes it was the full version with 7 (MAXIMUM) quality set.
Old 16th June 2010
  #18
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Quote:
Originally Posted by Jantex View Post
Hi Robo, yes it was the full version with 7 (MAXIMUM) quality set.
Brilliant, thanks.
Old 27th July 2010
  #19
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Haven't seen this thread before. I also own the T-Racks, LP10 and EQuality.
It was mentioned to do more comparisons....any chance to do so?
Old 27th July 2010
  #20
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I didn't know the Sonnox was Linear. I thought it was only minimum phase.
I've used it in other studios, but don't own it, so I don't know it intimately.
So now I have to make a note to download the test up there and hear the
comparisons for myself. What I am reading on here so far seems surprising.
Old 27th July 2010
  #21
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Hey, can I just check a few things quickly.

I've been trying to phase-cancel these. If these really are linear phase EQs, then they should phase cancel really quite accurately, and the spectral shape of what's left should reveal differences in the response shapes of the two EQs. I see extremely poor cancellation; like 28dB between PLParEQ and IIEQ.

None of these phase cancel. The lack of cancellation between the Sonnox and a linphase would make sense; although even that displays a bizarre pattern.

Every time, I try cancellation, I get a phaser-like signal from the verb-bed.
More than this, the signals don't cancel anywhere in the spectrum.
It's like they're at different levels, or they're not sample-accurate compensated.

Looks to me like you bounced with a reverb enabled; probably something like a Lexi modulated reverb, and this throws the results off, making an accurate test extremely hard. Could you please render the signal static to audio before doing this test?

I can't think of any other explanation why there'd be such poor cancellation between EQs with near-identical settings. At the very least I'd expect everything below about 1k (which isn't being affected) to pass through unaltered.

I'd anticipate some difference, but these results are just plain weird.

Dave.
Old 27th July 2010
  #22
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Quote:
Originally Posted by Mark D. View Post
I didn't know the Sonnox was Linear. I thought it was only minimum phase.
I've used it in other studios, but don't own it, so I don't know it intimately.
So now I have to make a note to download the test up there and hear the
comparisons for myself. What I am reading on here so far seems surprising.
The Sonnox is the minimum-phase sample in the bunch. It is not linear phase.
Old 27th July 2010
  #23
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can the NuGEN SEQ2 be added to the test ?

I've heard good things about it.

thanks!
Old 28th July 2010
  #24
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Can apulSoft apQualizr 1.4 be added to the test ?
Old 28th July 2010
  #25
Gear Nut
 

Quote:
Originally Posted by DaveGamble View Post
Hey, can I just check a few things quickly.

I've been trying to phase-cancel these. If these really are linear phase EQs, then they should phase cancel really quite accurately, and the spectral shape of what's left should reveal differences in the response shapes of the two EQs. I see extremely poor cancellation; like 28dB between PLParEQ and IIEQ.
Why should PLParEQ and IIEQ have identical phases? IIEQ is not a linear phase EQ...
Old 28th July 2010
  #26
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I think he meant LP10.
Old 28th July 2010
  #27
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Quote:
Originally Posted by docdued View Post
Why should PLParEQ and IIEQ have identical phases? IIEQ is not a linear phase EQ...

I think he mixed up IIEQ with LP10.
Old 28th July 2010
  #28
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Interesting, just last week I sent a note to the developer of DDMF LP10. I'm curious about some results I had in splitting a signal using it's hi-pass at about 500 Hz and low pass at the same. Recombining them and trying to null against the original, I didn't get deep null results at all. I'm wondering about that still.
Old 29th July 2010
  #29
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Quote:
Originally Posted by miro View Post
I think he mixed up IIEQ with LP10.
Sorry, yes, I did.
Old 29th July 2010
  #30
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Quote:
Originally Posted by TranscendingM View Post
Interesting, just last week I sent a note to the developer of DDMF LP10. I'm curious about some results I had in splitting a signal using it's hi-pass at about 500 Hz and low pass at the same. Recombining them and trying to null against the original, I didn't get deep null results at all. I'm wondering about that still.
What does the spectrum of the nulled signal look like?
If you see a lump at/around 500hz, it indicates that your settings were incorrect; grab an analyser and verify that you get -6dB at 500Hz from both filters; with 24db/oct this should work out correct. Also, you'll need a Q of 0.707, using the standard definition. Plausibly the EQ designer might normalise this to 1. I've seen weirder things.
Also, make sure you test on a static signal! :P

Dave.

Last edited by DaveGamble; 29th July 2010 at 02:20 AM.. Reason: Clarity
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