EQ = sound quality? - Page 2

 

 

This is starting to get into my trade secrets area but I promise you...it's measurable.

 

Engineers know this! The reason you get crappy remasters is because they give into client/producer demands most of the time or, in some cases, use the wrong source.

 

 

I'll try to explain, if I can.

You wanted more bass, EQ'd and got more bass and you're complaining that it is not better bass?
Let's turn this around: your headphones have too much bass around 100 Hz which masks some of the details in the lower midrange. You can easily EQ the bass-bump away and as a result get a more balanced sound, probably less distortion and lower midrange details will become easier to hear. If this isn't a perceived improvement in sound quality I don't know what is. Maybe you're confusing signal integrity with what we're talking about here.
That's either a case of a bad EQ or misconfiguration. You really should try a "pro" EQ.
See above.
  You still haven't come up with a valid reason that EQing is bad.
The scenario you just mentioned seems to be in your head only. And it is ridiculous indeed.
Edited by xnor - 4/27/12 at 1:22pm

 

 

I know I know, stupid bus is loud as crap, on my a new BUS having my volume is much lower and of course when I'm alone it's pretty low, and yea I need better headphones, a good pair with a nice isolation or good seal would be nice! The biggest issue those are those old busses... they just make SO much noise.

 

In addition I've heard noise canceling is also bad for your hearing, as even though you can't "hear" the signal used to defuse the external noise it's still coming into contact with your inner ear and if the noise around you is loud enough your still doing damage,

 

Also thanks for the EQ tips! very nice information indeed

 

@Xnor

 

That's a good point, I've never thought of eq the bass down to get an improvement in the quality of it, although I don't really need any more bass, the issue I have with my cans is everything else although I'll eq is only a band aid for my cans, a better pair is needed xD

Edited by Mshenay - 4/27/12 at 1:41pm

 

Actually, you have, every piece of pop/rock/soul music is heavily EQ'ed before making it to the shelves, you may find classical or jazz that wasn't EQ'ed, but even with those genre, EQ'ing is quite common.

 

Id say EQ can not change sound quality. An EQ only affects frequency response -- it can not affect anything else in the signal. You can make a track sound better with EQ though, which is done in mixing, mastering and many times the end consumer does it as well.

A cable can not affect the definition, tone, extension or the impact (etc etc) of the bass; either it delivers the signal as it is, or it doesnt (its broken/not working properly and needs to be replaced). To affect those things you need to use effects/filters (not good for quality, unless you want to create a different sound (which you dont want unless you are creating music))) or re-record. You can use EQ to make the bass seem different, but its only a mind trick (youre not doing anything but increasing or decreasing amplitude).


There are several very good (free) VST EQs available.

Ill expand LFFs EQ help-list a bit (for people at "I use presets" level and those you want more technical knowledge):


In graphic (software ones, hardwares can have knobs) equalizers, every bar is called a band. Each band has a frequency or a frequency range. This is the 3 first bands of the Winamp EQ.



-     -     -      - 3+
-     -     -      - 2+
-     -     -      - 1+
-___-___-___- 0-/+ dB
-     -     -      - 1-
-     -     -      - 2-
-     -     -      - 3-
  70  180 320(hz) 


Frequency range is calculated (X+Y)/2, so frequency range for the 180hz band is 125hz to 250hz. (180+70)=125 and (180+320)/2=250.

Adjusting the 180hz band will affect all sounds within its frequency range. Many instruments might have parts of their sounds here; You might want to adjust the bass instrument but end up affecting the drums and the guitars as well. This is the way EQs work, and while a more detailed EQ might somewhat remedy the problem, you need to go back to mixing to affect individual instruments (unless you made the track yourself or work in a big, famous studio, its unlikly you have access to the mix though).

We use Decibel to measure sound loudness. Decibel is Logarithmic unit. To quote wiki "A change in power ratio by a factor of two is approximately a 3 dB change". That means +3 dB will make your sound twice as loud. Keep that in mind when you EQ.


To know what instruments are in what bands/frequencies, LFF recommended a carnegie chart. This can be a good idea, but experience will be far more helpful to pinpoint sounds. Metal vocals will not in the same frequencies as rap vocals. To get a better grasp of "where" the sounds are, play with your EQ. Set bands to max or min and observe how the sound changes.  While not especially pleasureable, it will make you learn.


Aggressive EQing can introduce clipping in your music. You can avoid this by , as LFF said, "It is better to subtract, rather than add". Play with your EQ to learn what settings that introduce distortion, clipping and other artifacts.


If you see a switch/button/whatever and dont know what it does; click/switch/manipulate it. Its the best way to learn and unless you are working with live sound you cant break anything.


EQing is very simple but to get the wanted results might be very hard (unless you are EQing for fun/to learn, you should have a specific goal with your EQing. Like "compensate K701s lack of bass" or "make the cymbals not give me headache").

The day you find your EQ lacking, get a compressor.






 

Edited by acef2 - 4/28/12 at 12:23am

But it does. Also, it not only affects frequency response but also phase response. Most headphones are single driver, minimum phase systems and therefore you can correct (aka equalize) both frequency and phase response with a min. phase EQ.
Frequency response is the most important part of sound quality. Think about it this way: you have a headphone that has very low distortion but a 10 dB bass peak. Perceived sound quality will be ruined by the peak. EQ the peak away and you'll get a much more higher quality sounding headphone.
That's not a mind trick. Same as headphone with boosted or rolled-off bass are not mind tricks either. And you're not only changing amplitude, but also phase and therefore group delay just like the headphone driver does itself.

Regarding graphic EQs: I've seen many graphic EQs with filters that not only work withing a single band but leak into the adjacent bands as well. Not what you'd expect by looking at the EQs user interface, but some EQs just work this way (without telling the user).
I prefer to boost and cut where necessary and use a preamp* to avoid clipping. This way you can EQ with less filters, and higher sound quality.
*) kinda the wrong term since you can apply the gain after processing the signal with the EQ, provided you're using floating point (like foobar2000 does internally for example).
I definitely wouldn't recommend a compressor in a playback chain unless you know exactly what you're doing, and also not as a "better EQ".
Edited by xnor - 4/28/12 at 4:39am

 

 

so I could get a pair of 'Beats' headphones, EQ the hell out of it, and transform it into a fantastic sounding headphone? I really doubt it, even using pro EQing.

 

nahh, EQ is not my idea of improving SQ, at all.

 

 

 

That's extremely subjective.

A flatter frequency response is extremely subjective? How so?

As I've said before, frequency response is important, but certainly not the only thing that matters.
Your example is deliberately exaggerated so I don't see a point in commenting on it. And your doubt is no reason that EQing is bad.
Edited by xnor - 4/28/12 at 9:16am

Saying that a flatter frequency response is a higher quality.  It might be higher fidelity when playing back traditional acoustical instruments and orchestral compositions among other things, but there's definitely room for coloration to cater to each individual's liking.  Case in point, Beyerdynamic, Grado, HD800, Denons.

 

Also, headphones with neutral bass are indeed not heard as neutral.  Headphones deliver an exceptionally different type of bass than the natural and omnipresent type of bass you get from speakers.

Flatter doesn't mean a flat line from 20 Hz to 20 kHz. There could still be a bass boost, but without the peak around 100 Hz (which some would describe as one-note bass). This was just a random example, but fwiw I prefer flat bass, i.e. using a shelving instead of a bell (aka peak) filter to boost bass.

Also, I don't see a problem with including a subjective component in the definition of sound quality since we're talking headphones here.
Edited by xnor - 4/28/12 at 10:49am

Xnor, it's obvious you know what you're talking about....

 

For the naysayers, doubters, misdirected masses, and those who don't believe EQ helps sound quality, I'd highly recommend that before you continue posting nonsense, you pick up a book on sound and read it! When I say book, I don't mean crap written by Robert Harley either....pick a book written by an engineer or physicist.

 

To make it easy for you guys, look at this thread.

 

 

Edited by LFF - 4/28/12 at 12:00pm

 

 

 

Edited by Lenni - 4/28/12 at 4:20pm