Asymmetrical Waveforms, DC Offset, HPF Madness, Phase Rotation and Parallel EQ

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[@tazcerogers2947]

You’re a sexy beast and great content, thanks

[@wyrlismike]

David is the man! I love this guy

[@busyworksbeats]

THE GOAT 🐐

[@mixbustv]

😄🙌🙌

[@heavymetalmixer91]

When it comes to multimicked instruments I always put the HPF on their bus, except drums, 'cause hell, managing the low-end on each drum is HARD.

[@RiggiMediaInt]

Absolutely correct cause and effect explanation of DC offset. Bravo

[@lunaticmoonstudio]

Instead of an Audio Engineering Degree, I should have just paid to go to David for 3 years, listen and take notes. I would have learned more! Thanks again David for the great content.

[@lovetothebone]

I never once thought about this untill today. I am FINALLY recording my vocals with decent (DBX 376) and now the waveform seems more lopsided. I was surprised at how much reduction was going on at the comp. stage at only 2 to1. The result sounds much better than ever, even with a Beyerdynamics TG-X58 (almost identical to Shure SM58) THANKS for the great explainations

[@aleciocosta]

Very good explanation! Thanks! I just would like to add that this DC offset shall be present due to hum/noise while the musician/engineer was tracking: Ground loops, 60/120 Hz humm coming from the local Power Stattion or neighborhood. Once I faced a situation where there was a Car shop using lots of machines that generated a pile of harmonic content and it contaminated the electrical system in the neighboorhood.

[@davidallenhammond2777]

Thank you David, excellent explanation. I appreciate you sharing these videos!

[@TallyTechandTroubleshooting]

EXCELLENT explanation, David and thank you VERY much for the top-notch assistance you continue to provide! Rock on, my brother!!

[@martinrenegade]

Thankyou this has come up for me recently and this is by far the best explaination. Love your work

[@georgepelekoudis]

Thanks! Nice follow up to the hpf/eq series!

[@Dvfacu]

This channel is the best! Great professional content. Thank you for sharing your knowledge David. Greetings from Argentina!

[@somethingsomething3248]

Such helpful clarification! Thanks for making a video on this! :)

[@urigeheadmot1196]

Thank you for the knowledge!

[@Shotty4HF]

Loving these videos, very helpful, thanks.

[@raymondspagnuolo8222]

Very helpful! Thanks for posting!

[@Crossfire2003]

Great video! I saw the DC offset option in Pro-L2 and I didn't know what was really about. Now I understand.

[@christianpahud406]

Thank you, it's so helpful!

[@claudius3124]

Eh David! I'm watching this a bit late but just wanted to say that you're a very very good teacher and communicator! Really, when you explain things, it all starts to make sense, which is really what most people need, more sense, lol! Joking apart, thank you very much and have a good day, whatever day it is... ;-)

[@gaudinni]

Thanks David!!!

[@JS-vh4yq]

Shifu David spittig audio facts once again. You help me every day to find the strength, knowledge and wisdom to continue the pursuit of the art of audio engineering. Thank you.

[@aholder4471]

As a wannabe internet engineer myself, I have to say you have some of the most useful and advanced info on KZbin. Many thanks.

[@gravityfreaksmusic]

Very good stuff! Thanks mate!

[@jordisonjr1]

Thank you so much for this, really important information.

[@Junvid]

i always asked to my teacher(when i was studying) why some waves have that form, if it was a problem or...why they look so asimetrical;but i never had an answer. Now i have and also have more info in this king od stuff. Very util video, thanks from Spain!

[@TheHiddenStudio]

Great explanation David!

[@ObraBass]

Thanks for this !

[@violamoonshape4428]

Super-excellent information! Grazie.

[@dennisniclescobas8009]

gracias maestro !

[@wendlinka]

thanks for helping me to understand difference between 'dc offset issue' and 'asymetrical waveform' which was for me difficult because of some misleading 'tutorials'. Thanks, and take care!

[@SonicologyRecords]

Great video!

[@oscarfernandez9964]

Very helpful.

[@minwang8648]

Amazing content

[@RecordingStudio9]

Just learned something new about HPF in parallel comp technique

[@EastOfGreenwich]

Thank you

[@cryptonios]

you have opened my eyes once again David...and ears!

[@cryptonios]

@@mixbustv oh david...a question...i tend to put reverb on the bottom head of the snare...equing the reverb affects also the phase with the top head?

[@cryptonios]

@@mixbustv thnanks David...keep rockin

[@nebstaism]

Good video thanks for the info ⚡️⚡️⚡️🤟🏻🤟🏻🤟🏻

[@Boback111]

Good explanation, think people including myself often look at only the right or left channel by itself and misinterpreting the asymmetry as dc offset. In reality simply panning will introduce asymmetry to your left and right channels which obviously isn’t offset, that’s how I remember it.

[@JacopoMazza]

Grazie!

[@lahattec]

Gold! :)

[@JussiTuukkanen]

thank you

[@Appelienable]

Greaaaaat explanations thanks a lot :))))

[@AceDeclan]

Thanks bro

[@CL-ob5bk]

Thanks!

[@mixbustv]

Thank you!

[@b.hornetiii.6771]

This was top video. I was just getting annoyed so much about this DC offset and 101 explanations etc. because I see a lot of times a little DC offset when I use outboard virtual analog synth and I plug it in via optical in/out into my workstation (another synth, my main mixing station) and there's always some DC in the final mix but not a lot; and only when I use that synth. So I just have to fix (i guess) the DC problem in a single track (or tracks) coming from that "outboard" gear... Thanks a lot. You saved my nerves again haha.

[@nicholasparis5281]

BAM! That's what the hell I've been waiting to hear for over 15 years - I never understood when to HPF in the mix... Do you do it on each individual track after it's already been done on the rack gear you recorded through (seems redundant after doing it once but?).. anyways, it now totally makes sense that hey if you work for hours to achieve a great stereo or multiple mic capture, then if you'd HPF one track separate instead of that nifty - wait until you aux bus or stem that sh*t to HPF and you'll keep phase correlation in check bc you're treating all sources as a whole... easy! Same easily makes sense with the parallel EQing.. same concept different avenue it sounds like.. & David, you're like Plato of the mixing world man... you can explain something so a 2nd grader can totally understand.. and you are a sexy beast lol (shout out to Tazce Rogers there)... AND I Like that shirt my friend!

[@beachforestmountain4269]

David; your tutorials are the best mixing/mastering tutorials on the internet, thanks for your effort. In any given subject, there is always one teacher who stands out from all the other teachers, and it's never the most popular teacher who stands out. For music theory, it's a channel named "Mangold Project". For mixing and mastering, it's MixbusTV.

[@cocorinow]

DC offset does not happen when the peaks are higher on one side than the other, but rather when the integral is not 0

[@nicholasparis5281]

Makes you wonder how those old school fellows figured out about it without visual representation of the track like we have these days in a DAW... I mean, just bc something doesn't sound right.. how does the mind get to - the gear is producing the waveform to become off center... A VU meter wouldn't show that, correct?

[@cocorinow]

@@nicholasparis5281 oscilloscopes have been around for quite a while. generally, since sonic is a wave and AC current is also a wave, everything in the electronic world applies to sound as well (to be more physical, the difference between sound and electricity is basically just the medium the waves travel in). so all these electrical components e.g. filters have been figured out for quite a while at the point in time somebody invented the speaker (which is basically nothing more than an electromagnet)

[@nicholasparis5281]

@@cocorinow hey thanks interesting!

[@soltan_sound]

can we use phase rotation for gaining some headroom?

[@insertanynameyouwant5311]

I know what I`m not gonna practice - 2 microphones approach lol. Like as always!

[@SudacaBeatz]

thanks fr this outstanding and very clear info. question: Ive seen Dave Pensado sending a kick to a bus and insert a dbx 160 and then HPF and LPF to blend that with the original signal. is that making phase correlation problems?

[@mixbustv]

Yes, but there's more to it, this video will explain why Dave does it (and I do it and many do) kzbin.info/www/bejne/oJu7dmVoa7-Bo9k

[@SudacaBeatz]

@@mixbustv awesome! Thanks again for all your information I learn a lot with your videos! Greetings from Argentina!

[@SorenAraujo]

@mixbustv you should seriously consider becoming a university professor. ☺🙏🙏🙏

[@fuzzupuzzu]

hey, thats really cool I always wanted to know that... just one question.... why are the waves asymmetric sometimes ? what is the exact reason like physically if we have to talk about waveforms and stuff??? specially as sometimes a full mixdown is like that, so I want to know the exact reason, to what is causing it.

[@fuzzupuzzu]

hey thanks a lot for the reply and the great video, awesome stuff.... feel free to go into more details if u wish to, cheers.

[@wouterdesmedt1736]

How do you deal with the phase shift in HPF/LPF filters when splitting single tracks into frequency ranges? I like this technique a lot for kick and bass, but I also see now why I have had mixed results so far. Would using linear phase filters solve this as well?

[@wouterdesmedt1736]

Makes perfect sense. Thanks for taking the time to write this up. Makes me want to experiment with it some more!

[@lovetothebone]

I almost always double my guit track or use 2 mics.....and almost always treat them with different EQ settings to make it sound like "more". How WRONG I was. Thank you

[@getstew]

Could having cabling with L/R sides switched in a couple places coming from a source to a mixer, into an interface and then into my DAW cause DC offset problems that couldn’t be corrected by using a plugin? I had tracks that were very off and now have re-cabled. Seems to have fixed it. Thanks!

[@mixbustv]

No, you'd have it anyway, you get DC offset problems when something is faulty in your chain, cable, connector, a power supply etc..

[@josefrancisco6969]

Normal cuts and boost don't alter the phase as much as high pass filters right?

[@heavymetalmixer91]

Yeah, but they don't cut as much as well and in a different way.

[@jadedragon469]

What I'm understanding is that if I were to use a chain of let's say VP dynamite|Chandler Curve EQ|Saturation on my parallel channel send, I shouldn't high pass on the Chandler eq But on source signal send? If I wanted to refine the area of desire I wanted in my parallel channel would using a shelf instead of HFP sort this phase adjustment that occurs or is the eq on source the only way?

[@mixbustv]

You have to use a linear phase eq if you absolutely have to eq the parallel. Watch my videos on parallel eq

[@Rybson666]

You mentioned that eq'ing multi mic tracks individually also cause phase shifting, but is that as invasive like hpf? I tend to eq individual tracks; snare bottom , sometimes unwanted harsh sounds on one guitar mic, should I avoid it and try to get results on busses ? And one more thing: I often copy DI bass tracks for different processing, and use drawmer-like hpf/lpf at 6db/oct on each them; one for lows, second for ovedrive, last for accents - what do you think ?

[@Rybson666]

@@mixbustv I get it ! thanks for comprehensive explanation, no doubts now ;) Sometimes I just analyse to much, but I like to know how things work, and why do this or that in certain situation ;) cheers!

[@nicholasparis5281]

Great Q&A! David that reminds me of your drawmer 73 that compresses different frequencies with that 3 way side chain filter/eq/ tone shaping section, and whether the audio track is being blended in with the "mix knob", or mixbused' in parallel and overtop your mix as a whole, then would phasing there basically be the same philosophy except that you might now have to go back into the mix to correct phasing from the newly added mixbus, specifically back to each individual stem or even track, and then to be extra cautious to listen across the spectrum for subtleties in each element that might have been harmed by tweaking the mixbus? & is that another great point for the argument to start mixing into your mixbus as early on as possible? ... i'd imagine hypothetically if yes to the last question then that there's going to still be tweaking on the mixbus even towards the end right.. so that knowledge would still seem quite useful especially in those cases...

[@nicholasparis5281]

@@mixbustv makes sense and it's not too disimilar from the drawmer 78 (only has 2 instead of the 3 side chains).. Thanks again for taking the time to help David! You guys rock!

[@preciseaudioblog]

Thank you so much! I recorded my active bass direct to the Apollo Twin and the waveform is asymmetrical. I was worried my bass or interface had a problem. I notice in your video that usually happens with low freq instruments. It also happened to me with an active acoustic guitar I recorded directly to interface... is it normal? Cheers!

[@mixbustv]

It depends in it's just asymmetrical like in the video or if the center is offset, if the second then do have a problem. I've never seen that happening with ac gtrs

[@preciseaudioblog]

@@mixbustv it's like in the first case (trombone, bass, etc) thank you for the answer. Cheers!

[@chadmichael_]

Why does DC offset happen? Thank you for this video btw.

[@hitz4days875]

What is DC offset

[@AngeloMM88]

👍

[@vextract4662]

LOL, Glad I'm using hpf on guitars and kiks buss not the source track checks out with your advice. Shwoo!😥 don't have to make any changes.

[@counterrage]

smooth hpf by lin phase eq dont changing phase.

[@counterrage]

@@mixbustv so why so many hype around phase shift if exist linear phase EQs? maybe I'm missing something?

[@st33Npuist]

🐅

[@Kotjek]

I clicked on video because u look like hamood habibi So i know i learn from true god.

[@Mike_Benz_]

Not a problem in the mix till you send it to your Mastering Engineer

[@mixbustv]

If the entire mix is asymmetric, then you have a problem (which is either your gear or you don't know how to mix) and you should hear it before even looking at it. One of few tracks with asymmetrical form are not a problem in the mix *nor* in mastering.

[@Mike_Benz_]

@@mixbustv I agree, unless your Mastering Engineer is John Mayfield kzbin.info/www/bejne/iaa8d4qbjdp4qKs He will ask for that one track to be addressed in the whole mix.

[@mixbustv]

I won't comment on the video you linked out of respect for the engineer. Let's just say in the BEST case scenario it is NOT what I'm talking about here, or in a way it is, I feel you missed the difference, yet, that video is at best questionable.

[@Mike_Benz_]

@@mixbustv No worries, and I respect you for that. I will try look more into it, or not, as I agree with your first reply.

[@francomascotti9744]

Class A Info

[@JediMobius]

I was browsing a sample library and kept finding the odd asymmetrical waveform, and wanted to know if this was a problem and if I could fix it. Your video came up first, and you answered my question perfectly! Don't mind the extra knowledge either.

[@JussiTuukkanen]

Do you know why DC offset creates frequencies below 20Hz ?

[@JussiTuukkanen]

@@mixbustv Okay, thank you. The reason i am asking is because when u have a( ny ) DC offset, and you put a HPF at 10Hz, it clears the DC offset

[@JussiTuukkanen]

@@mixbustv Interesting, good to know

[@ruudlexis2342]

@@JussiTuukkanen DC is 0hz. When coding you just add a constant value to the signal to create DC: input = input + 1 Don't try at home, this is a 100% offset.

[@JussiTuukkanen]

@@ruudlexis2342 Thank you, what do you mean by adding constant value to the signal? i am asking, because i can basically have the same waveform in both ac and dc ( mode[ s ] ) , but just with a DC offset it becomes a different variation of the energy either on the + / - side of things ( wish i or we could add graphs here, but : ) what do you mean but input = input + 1 and a 100% offset ?

[@ruudlexis2342]

You're right you can also subtract that value, maybe a 50% offset would be more correct as digital audio has a value of -1 to +1. I was just saying it's an extreme offset too provent potential speaker blow-up's. Too break it down, digital DC is just a stationary value that get's added to every sample. You can add it positive or negative, + or -, but never both, as the different polarities will cancel each other out.

[@whileimgaming]

The phase rotation side of the video was bit too short for my taste. This is something i'm not very good at, and would love to hear how it should be done.

[@whileimgaming]

​@@mixbustv I understand phase, and the only reason i watched the whole thing was because of the phase rotation thingy :D I don't track, but when the band has very low budget and a mindset of a "you'll do everything", it couldn't hurt. If you find the time, please do one...

[@musicNix12345]

4 dislikes are from people who dont believe in asymmetrical waveforms theory

[@mixbustv]

Flat earthers 😄

[@keepmovinent7679]

lol anytime i need to double check sum'n i just search for it with ur name bro, when are u coming to Jamaica so we can some some ganja together fam

[@timonbutcherman]

Autolike!

[@crmatt99]

Good farty synths!

[@MedullarisConus]

You're like 7' tall?

[@mixbustv]

nah I'm 5"9

[@MedullarisConus]

@@mixbustv you look like a basketball player. I guess your body proportions give that impression