Digital EQ (Off Topic)

by GC, Saturday, December 22, 2007, 08:39 (5942 days ago) @ Sjef
edited by GC, Saturday, December 22, 2007, 10:41

Hi sjef

I think I have said this a couple of times before but read my lips, you
guys are all going to use some form of digital xo/eq somewhere in the next
few years once you will discover the disadvantages of analog filtering.

Would you name a few of these disadvantages that you discovered?

> All the complains here sound to me like history repeating. Digital xo/eg is

just a complete new way of looking at things and needs a complete new
learning curve to get the best out of it, many commercial solutions are
doing it only halfway at the moment but things will change for sure.

No doubt this approach is under development.

before judging on anything that messes around with bits just start to
realize what the oh so many disadvantages of linkwitz/bessel/butterworth
etc filtering are compared to phase linear (when executed the right way)
then you will find out that there simply doesn't excist a way of
excecuting a analog filter the right way.

Oh sjef I really have to disagree here. There are no any other disadvantages than those apllied to the use of components itself.
You mention a few transfiguration equations. Have you ever heard a filter that apllies 1 in 1 out acoustically? I mean this is analogue perfect.
For the digital controlled loudspeaker you can achieve the same. So where I differ from your stances here is that digital filtering 1=1 just has so many anomalities that it IMO can't compete with the correct analogue approach. Not that I heard of at least.

If you have not heard an *analogue perfect* loudspeaker, ehh what to say then? Then you just missed it. And this is very likely to be the case as you can hear that only a few places in the world.

Looking into the Digi-eq/DSP world I see a few more components messing with sound.

Would you also be kind to tell me how you are able to hear differences between a phase turn of say 360 degrees within a frequency bandwith, your choise, compared to a 0 degree phase liniar bandwith? How do you percieve this?

I ask because I caNot and there are eveidence enough to find on the net that proves the oposite of what you claim here. Such as blind-tests. Most test persons reacts to that like we reacts to placebo effect.

I have heard speakers showing both 0 phase linear perfomance achieved analogue and digital. Neither of the approches showed even one advantage to me comparing to an analogue perfect speaker showing a phase turn as long as everything in there has the same phase turn

And before judging any form of
eq just realize that a crossover like the one used in the oris system IS a
equalizer and also realize that a perfect listening room DOES NOT excist,
eq can help here and that is in fact also what yoy guys are doing with
crossover tweaking as well. In my room the implementation of a digital
xo/eq has made some improvements wich I simply couldn't achieve with
better speakers/amps/playbacksystem/acoustics treatments, specially the
low end has improved tremendously and with the low/end the whole
presentation of the music has also improved a lot. Digital xo/eq is not a
cure for all and it has disadvantages as well I know (those thamn opamps
again, the first thing you will have to get rid off) I also know that it
will take you about forever to get it right, just trying it on a afternoon
says nothing, it will take you months, yes much more time than with analog
filtering.

And what the use of bit perfect when the rest of the system is not "analog
perfect" anyway, messing with bits can make the system more "analog
perfect"

Sjef somehow I think I know what you point at. I'm not attacking your approach and your vote for Digi EQ etc. This is your opinion.

But I certainly do not agree with you about your analogue oppinions...far from.
I can of course not know what unluck you had with your approaches to "analogue perfect" that lead you to have such a stance as you point out here?
Maybe you did not have the right approach to dial this in? Anyhow I have still to hear the digital perfect dialed in system, as the few I heard, no matter how much *they* were dialed in made me run away.

GC

But this of course just about different oppinons :grin: as no one of us actually prove anything here. Do we? :wink:

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