Is EQ8 a linear phase equalizer?

[Alexis Forge]

it's almost certainly not

the Waves LinEq takes so much juice it isnt even real time - you dont hear changes until you let go of the knobs

[Angstrom]

Dont mean to hack the thread... But didnt we at one time establish that Live´s reverb is MONO...!?!?
Correct me if Im wrong...
Regards

you are correct, Live's reverb is mono
http://www.ableton.com/forum/viewtopic. ... 296#467296

there has been no official word on this issue.

[leisuremuffin]

if by mono you mean it only takes a mono input, you are correct. But so do a lot of super expensive hardware units.


it does create a stereo image though.




.lm.

[jesQuick]

Dont mean to hack the thread... But didnt we at one time establish that Live´s reverb is MONO...!?!?
Correct me if Im wrong...
Regards

you are correct, Live's reverb is mono
http://www.ableton.com/forum/viewtopic. ... 296#467296

there has been no official word on this issue.

The above thread tells me the output is mono as well...

[Angstrom]

I think the output is actually a sort of 'stereo' , simulated from the chorus section for the reverb. though obviously it's not going to get accurate or true stereo info from a mono input. It's simply 'widened' mono.


RE:Expensive mono input reverbs
really ? I guess there must be some out there, but the ones I have used were all stereo. I'm not exactly Mr 50k Reverb-Rack though.

Which expensive reverbs are mono input only?
I had a quick look around there and couldn't spot any obvious ones from Lexicon and the likes. I know some let you choose mono patches, but that's not the same as one physical input.

[leisuremuffin]

y'know what, i was a little confused there. Now that i think about it, you're right, most of them do have stereo inputs....


.lm.

[rich garside]

Just reading about Eq in a good book called Mixing Audio Concepts Tools and Practices which has accompanying audio examples. What its saying about linear eq is that it can sometimes remove unwanted artefacts that are produced when using a normal eq but sometimes when those artefacts occur in a linear phase eq they can be worse than using a normal one. There are two audio examples: using a linear eq and then a normal eq separately on a snare and the linear eq sounds fucked it creates a kind of pre resonance sound on it which is awful and extends the resonance after it. Then on a steel strung guitar there is a high shelf boost of 12db above 2khz. The normal eq sounds a little bit gritty only slightly on the top end and the linear phase eq sounds a bit smoother and more natural. So I think the bottom line is you need to learn the difference between the two of them, learn eq inside out in terms of when and how you should use it, train your ears to be more receptive to subtle changes in frequency produced by eq, and try out the different types of eq in different situations to see which provides the best results. Sorry in answer to the original question i don't think eq8 is linear phase it would say if it was. Knowledge is power. Use it to take a more informed approach to your decision making process while producing. Basically just read about yeah.

[Warmonger]

There are only very specific cases when filter can be linear-phase and live EQ is not one of them. In fact, I've never seen linear-phase EQ yet.

[savyurrecords]

Part of what gives eq its sound is phase shifting. You will notice when using a linear phase like PSP Neon is that you can make more drastic boosts and cuts before you 'hear' them.

As others have said stop worrying about what plug in sounds better than another plug in. A good engineer can use any tool. A bad engineer can't use any tool at all no matter how 'high quality' it may be.

[theophilus]

Which expensive reverbs are mono input only?
I had a quick look around there and couldn't spot any obvious ones from Lexicon and the likes. I know some let you choose mono patches, but that's not the same as one physical input.

the PCM70 apparently has this topology.
note: like robert henke said, most of them have stereo inputs, but are internally mixed to mono, then sent through the reverb, so it might not be obvious.

[Angstrom]

Which expensive reverbs are mono input only?
I had a quick look around there and couldn't spot any obvious ones from Lexicon and the likes. I know some let you choose mono patches, but that's not the same as one physical input.

the PCM70 apparently has this topology.
note: like robert henke said, most of them have stereo inputs, but are internally mixed to mono, then sent through the reverb, so it might not be obvious.

This is also what Live's basic reverb device does, as I mention in one of my other posts up there from 2007 (!)

With reverbs which summed L+R to mono then process I find it strange that they gloss over this crucial detail, because if there are phase differences between L and R inputs, and these are summed then you can get anything from comb filtering to phase cancellation. If I remember right the way I tested this in Live's reverb was Utility set to "wide" and then send it to Live's reverb. You get no output. Well, it was 2007, so I can't really remember whether this was changed in later versions.

[doghouse]

If I remember right the way I tested this in Live's reverb was Utility set to "wide" and then send it to Live's reverb. You get no output. Well, it was 2007, so I can't really remember whether this was changed in later versions.

What I read in that 2007 thread is Herr Henke indicating that the input is summed mono.

Doh...you inverted the phase of the channels by using Wide, then you deliberately fed that to a input summing to mono. Yep, I'd sure as hell expect zero output.

So don't do that???

The reverb algorithm itself creates a stereo image and a true stereo reverb can be created in a rack. If you want to call the Live reverb "mono" because of that OK, it's mono.

Noone wrote whether or not they like the sound of Live's reverb did they?

And yes for the 1,000,000th time EQ8 is not linear phase.

[Angstrom]

I am aware of why it happens, that was my test to show it if anyone wanted a simple TEST to find out for themselves. Hence my use of the word test.
I understand what the reverb is, it's a freeverb port.

my point was, it's not immediately obvious to people what not to do.

[Epi Ego]

I think the point of linear phase eq is not to correct phase issues which has been discussed here bu to keep eq changes from smearing percieved depth when boosting or attenuating frequencies. Like not making my snare sound in the background when really trying to reduce its attack.

[XSIMan]

Only a mention of it being linear.

EQ Eight was programed for Live 9 by Cytomic. https://cytomic.com/ableton-and-cytomic
Cytomic also added his Glue compressor to Live 9 and in Live 9.5 he added to the filters with optimized versions from The Drop.



"The new algorithm for EQ 8 is an analog model of a linear SVF circuit, and as such shares the excellent noise performance, as well as ultra smooth modulation properties, of the ideal circuit. The cutoff of EQ 8 can be swept smoothly with automation without the horrible artefacts of commonly used EQ algorithms."


Andrew Simpler on EQ Eight https://www.ableton.com/en/blog/andrew- ... -eq-eight/

The Drop filters added to Live 9.5 https://www.ableton.com/en/live/new-in-9-5/