You can never truly be a pro engineer without understanding these concepts. This is the clearest explanation of phase shifting I have ever seen. Thank you!

This is such a great channel for all who take mixing and mastering serious, whether your're a pro or a enthusiastic homerecorder.

The more I learn about audio engineering the more I realize how much money I've wasted on plugins that I don't really understand. Truly, all audio comes down to frequency and amplitude within the domain of time. You could potentially do just about anything you want with just a stock EQ and versatile analyzer if you understand how these basic elements work together to create FX we call chorus, delay, phase shift, pitch shift, etc. Thanks for making us all better audio enthusiasts and engineers by taking us back to the basics.

I’m blessed to have found this channel tbh. I know this channel is gonna be huge one day. People sleeping on these videos

Weeks/months ago, I posted a comment asking for a video explaining phase issues of EQ, and you replied saying you would make it in the future. Thanks for keeping the promise 😍😍😍 I still didn't understand the direct reason why EQing cause phase shifts. Nevertheless, all these explanations about their audible results, and solutions, etc. are really informative. THANK YOU!

10 years ago i mastered some tracks with Sage Audio with premium results... i dont miss a video

Can't express how much I love this channel men! Your videos are the best videos with the best explanation I have found all over this 4 years of producing. I'm really thankful sage, you're awesome 😎

One of the best channels right now on YT. Please keep it coming. Such short basic explanations of audio topics is very helpful as we (begginers) hear all those terms but never understand them completely.

This guys make such amazing stuff to learn from. Thank you so much.

it's important to understand the audio phenomena caused by the tools we use, but at the end of the day what matters is the artistic intention when choosing what to use. Passive equalizers are widely used in mastering precisely because of the resonance they cause. Great video. You have gold content

You guys are amazing and appreciated ❤️

Im really happy I found this channel. amazing delivery

It's fantastic everything you do, thank you again. Shango from cameroon.

Omg.. Loved it.. Thank you so much.. 🙏❤

First and probably the only channel I'm hitting the bell icon for !!

Wow…..thank you so much for this! Easily the best video on KZfaq explaining phase 🙏🏽

Absolutely best description of both phase and EQ and phase

information Ive been finding for years, thanks!

Wooow!! This one is sooo valuable to me. Thanks a lot! Great content as always. Keep it up!

Fantastic! Respect for your job! Thank you very much.

You guys literally rock 🤟 Thank you for another great video.

all your videos are great man

Brilliant as always.

As an audiophile, i never understood the mechanics behind an EQ and phase shift. This is eye opening.

As a producer, you can spend hours using dC offset, stereo imagers, flangers/phasers/choruses, regular LCR-panning etc, to get your stereo image where you want it. You might even get it to work and sound good BOTH in mono and stereo. The thing with "fancy phase-magic" is that it is often only noticed by either people who themselves make music - or by the people with the expensive sound systems/headphones. The common consumer of music usually listens to music through either in-ears, non flat shitty beatboxes that are sometimes just straight mono (btw!) or just through their laptop speakers or gaming-headphones. What I'm trying to tell you with all this is because of the above stated facts makes it very risky to fuck with phase. The mix engineer or the master engineer is going to slam a phase-corrector (like a linear EQ) and just throw all that hard phasing-work you did out the window because that is going to get lost in transmission when people are using sound systems not capable of making sense of the signal. And believe me. Listening to a wide, magically phase-choreographed mix , with a perfect balance between all points of its stereo image, on a system that is sub-par or just cheap, or for that case IN MONO. It can sound like half of the song got sliced out. This is what so many people struggle to understand!!! Don't mess with phase or dithering because if you get a placement, some other engineer (if not the mix/master-guy then the recording engineer for the artist) is going to hear that phase being not how it should and slam it linear... all good and safe... and boring... but that's a bulletproof way of ensuring ur mixes don't gets lost between different listening mediums.

Great channel, I really appreciate the content TKS guys!

謝謝你提供的訊息，終於讓我了解到phase

very impressive i appreciate all your effort

Fantastic explanation!

lets say we're using a graphic eq like the pro q3 on the master, and we are using it for additive eq(low and high shelfs etc), should we be using it in linear phase mode or just regular mode?

I gotta save this one.

I use NO EQ except in very special situations, like enhancing a recording made many decades ago, pressed to vinyl, etc. I especially enjoyed the explanation of the Haas effect. Bill P.

i usually use natural phase mode on all individual tracks and linear phase on the mix bus, Do you agree with this practice? i feel like it would be impractical to put linear phase on every track

The Haas effect can occur in mono if different frequency ranges are delayed. The effect of non-linear EQ could be that the treble you boosted may be "pushed back" and this is the most noticable effect to me. Sometimes it can be subjectively nice in a way though, adding a 3d-ness but it can quickly make a master start sounding lost in the space, lacking impact, actually losing the thing you tried to bring up. *Haas effect merely describes the repetition of sounds (delay) being indistiguishable as separate sounds, and instead is heard as phasal changes (~30hz approximately,). Phasal changes allow stereo location though so its common example is Haas 'panning'

Great video

I think this is important specially to check things out when we have issues and check from where they are coming from?

What exactly does the natural phase setting do in pro q 3?

Fantastic

Thank you. ☺️🙏

Love the physics lesson.. was a reminder of the stuff I learnt and forgot in engineering.... however, when it came to the part comparing the linear phase eq vs the zero phase eq for the low end, I couldnt hear any difference whatsoever... what are we supposed to be listening for?

this video saved me

Briliant! I've looking for exacly that for so long!, and finaly- something about fase changes coused by EQ. Thank you guys!!

I'm such a mastering noob, I know what phase shifting is, but I had no Idea that eq plugins could have this effect due to how they are operating. I have heard it before and wondered what was causing it. In the past I past I have had to dial back what I was doing and find another way or try something else. I did not realise this was the cause.Thanks Great channel

My issue was with an AKG C7 condenser microphone that has a non-switchable 12db HP filter at 150 Hz that was producing an asymmetrical waveform when recording spoken word. On tone, from a sound source, the waveform was perfect. Turns out that I had to apply a +90 degree phase correction with the graphical phase effect in Audition to get the waveform to come right, allpass2 track 95 1 with Audacity. So long as an HP filter is not applied, this is not an issue with a Shure beta 58A and/or a Neumann KMS 105

I love your video edit! What do you use for those liquid transitions? :)

What Linear phase should be used for vocals? When switching from zero to Linear High in mixing stage the vocal itself sounds better to my ears. Just trying to understand the concept.

Ok so how do we use a linear phase EQ and combat pre ringing. And how do we use and EQ and minimise phase shifts?

Tell me if I'm wrong, but would this be a good argument for analog EQ at the point of recording, rather than afterwards? I know the potential downsides to doing that, but it means you won't be making big moves with EQ's and messing with the phase later on?

it is a challenging one. since sometimes the LP can smear the transients, so choosing the LP of MP is material depended. either way. your videos are super informative. I appreciate your effort and knowledge.

Also, you don't have 22050 "frequencies". There are rational frequencies, like 100.5 Hz

Still trying to get my head around this..but thank you the explanation

Thanks for this video. For years I've been searching for a understandable explanation of EQ phase, and while I'm still a bit dazed and confused, your information has helped move the needle. Is there good use of the phase curve shown on some EQs? I mean, if a track needs a frequency cut, can a phase curve indicate bad moves vs. good ones, or is just a pretty thing to look at?

does the phase still exist in the eq example with the hpf cutting the low, like i would do with my vocals, it introduces the alt eq curve, but what if i render that into audio, is it still there?

thanks allot no wonder my mix sometimes gets killed at the end especially my sub kik and 808s low end

Thanks for great video. Do you suggest to use Linear Phase EQ on hard panned tracks (for example 2 guitar tracks playing the same thing panned left/right). If I want to EQ one, would you suggest Linear Phase EQ to avoid creating Hass effect? I mix a lot of hard panned guitars playing same thing, should I use Linea Phase EQ on them when for example applying HPF? Thank you.

Hi, a bit confused. Use linear phase only to avoid phase cancellation problems or also in a creative way ? If it introduces latency, better to work with high latency in Daw settings ? what about minimum phase ?

to be honest i didn't hear that much of a difference and i didn't fully understand all the concepts but maybe i can remember the key words and have everything click one day. same as how i finally understand what correlation is and how mid-side eq changes the sound. now when i feel that the mix sounds muddy and certain frequency bands sound muffled i won't rush to the multi-band eq. i still need some visual cues for stuff like that but with experience i will trust my ears to spot the problems

Linear phase eq is good mainly on Sub Group Stereo Buss and Master Buss outs..if your using linear phase eq plugins, use the same plugin manufacturer ! one on each instance - Dont mess with Low or highs 'qualities.. keep them all the same value..I wouldn't bother using linear on individual tracks.. my opinion, but its through trial and error..Use Linear EQ over the Buss's? - Yes but on All of them.. So no delay / latency between Non and Linear processing - And Yes They are all leading to the Master Buss - sure.. If you want More Master Linear phase EQ?? You will be "linear Phasing" already linear eq'd stuff ? , it doesn't matter - because you have used linear phase on each Sub group leading to the master.. Meaning? Actual phase issues won't be a problem and any Bell artefacts will not be so apparent, ( I seriously doubt you will need crazy settings at this stage) as you are working on pre mixed buss's..Keep it all stereo , don't play with different "quality" values per instance.. I would Not use on individual tracks... let the art work before correction... unless the art is correction :-) Peace.

i just slap the pro q3 on and draw some shapes to my hearing, bruhh i dont even think about those technicalities

Hey pls help. I think untill we do parallel processing we don't need to worry about phase in mastering stage? Is this right?

People tend to make a big deal out of phase. In reality, using parallel eq will only give you a slightly different curve than the graph is showing. Hi, low and band pass filters can get wonky. But, you're not going to get some weird phaser sound. If you don't hear a problem, there is no problem. EQ drum spot mics, use parallel EQ. IT'S OK.

Gem 💎

So is it only overall amplitude on the master channel that suffers when two tracks are out of phase?

What is YOUR recommendation working with Fabfilter Pro Q3? Linear or zero latency? Is there any other kind of eq that you have in mind that doesn't work this way? Thanks for any given answers. Great video content 👌 Cheers.

trying to undestand this: so the phase curve is different than the EQ curve? To use a metaphor- the EQ curve is the wind that influences the surface of the water(phase). This wind is irregular and thus influences the curvature of the water in irregular ways. Why can't we make an EQ that directly modifies the raw phase curve? Or is that control only possible with synths not sampled files?

so should i use linier phase mode just on mastar buss?

what intro song

does this phase change effects vocals? i mean does it delays the vocals from actual tempo?

Is shelfing has the same impact on phase as filtering?

now i know why it sounds more bassy when i do a 20hz cut in fabfilter. this is a pain in the ass

How strong should the linear phase level be in mastering?

No surprise here, that song is sick.

Most of the time linear phase EQ is a solution looking for a problem. Sample rate conversion is its best use. Also most min phase DSP doesn't use fft as far as I know. EG a 6dB lowpass filter is just a single sample delay with feedback.

You had 2 identical acoustic guitar tracks. One was processed with a zero latency EQ. The other was processed (or not processed)? If it wasn't processed then where did the latency come from that created the HAAS effect?

Nice. Why is phase shift emphasized at lower freqs? Bc 0Hz is a dead end?

I almost never use linear phase EQ. Maybe I'm not that advanced yet. I actually use high pass filter sometimes on my bass guitar to shift the phase if needed. It can actually make the bass more audible.

I mostly use the "natural phase" or "Zero latency" dynamic EQ of Pro-Q3.

So basically digital EQ's don't ACTUALLY effect the RAW audio file - but rather act as an influence field on the raw audio. Bc this 'influence' is calculated by computers and not solid state electricity - theres sample gate and timing limitations which cause mild inconsistencies in the calculation of this 'influence' field we call digital EQ .You add that onto the innate phase inconsistencies introduced that even an analog EQ would produce naturally. So you get an extra layer of phase distortion with digital eq.? in analog EQs the inherent distortion is caused by shifting a complicated harmonic curve up or downwards in a very arbitrary but specific spot - which strains the amplitude curves of the original audio - causing distortions prior and after the change in an effort to keep a mathematically coherent curve moving through time. Am I close? Thank you :)

This is a really good topic. A question here… Usually I record two inputs for my acoustic guitar, one is line in and another one is using condenser mic. The purpose is to make it panned hard left and right to get wider stereo effect and two audio tracks contents different tone that make the ac gtr track more body and depth. But the thing is the phase issue. My approach is to use the melda auto aligned plugin on both audio tracks. But I didn’t apply the linear phase EQ or linear phase multiband compressor. I have the waves one. Is it necessary to use it on my guitar tracks ? And what if I want to apply different EQ curve to one and another ?

Everytime i do a low cut, should i always use linear phase eq to avoid phase problems?

Can you please make a vocal preset with only fabilter plug in?

I actually though the Haas effect sounded great lool

I almost exclusively use linear phase eq, but I print my tracks as soon as possible so that latency is no longer a problem, and neither is cpu. Doing so obviously introduces it's own issues, but I know my phase is always in tact

Can you elaborate on why EQs like this one only use 4096 “samples”. And what in this case a “sample” is referring to?

Never realised the math I learned in engineering would apply in my music endeavours ❄️

Hmm... 3 years late. You may have explained it but I think I missed it. Why does EQing shift the phase?

So basically don’t use zero latency?

Did engineers of the 80s ,90s knew about these concepts or are these relatively new concepts that engineers discovered due to the advancement of technology ?

I beleive most processors use a bit depth of 16 or higher, so your 4096 sample size example (also you don't clearly communciate size vs. rate) is for a 12 bit system. Perhaps the reasons given describe why phase shift happens in digital signals... doesn't not explain why they also happen in analog systems. Most people don't understand FFT and the math to catch this and your video while sounding really good and raising some good points, doesn't fully clear up the topic of how phase is introduced as many think it does.

How do you get in your face sound like professional Artist songs

as an edm producer for 15 years now I'd say that eq phase shift is not a big deal at all. it matters when eq'ing recorded live drums

What about natural phase ? What is that ?

But WHY do EQ's cause phase shifts in the first place? When turning frequencies up or down is an amplitude thing.

since this guy is an audio engineer...imagine his vocals for editing his videos...he makes his monotone voice sounds ENGAGING!

i dont know if its just me but i never heard impressive digital eqs. always feel some sort of loss in the sound 3d scape

So basically i have to click another button thats going to slow my computer down more

if i may humbly offer a correction, phase in and of itself doesn’t have anything to do with timing. the demonstration of moving the pure tones forward and backward to get varying amounts of cancellation is perhaps misleading and not comparable to the phase shift introduced by EQing. It’s true that time aligning different elements can move them in and out of phase, but it would be better to precise that phase shit can occur without timing differences and purely by rotating the phase of the signal, as is the case with EQ. peace and love ~

That’s why analog equipment is better, no phase issues.

This was Hard to Understand

I literally can't hear the difference