Plug-ins, Hosts, Apps,
Hardware, Soundware
Developers
(Brands)
Videos Groups
Whats's in?
Banks & Patches
Download & Upload
Music Search
KVR
   
KVR Forum » Instruments
Thread Read
Zero Delay Feedback Filter (How to test if your synth has a )- Xils-Lab White Paper -
Goto page Previous  1, 2, 3 ... 5, 6, 7 ... 27, 28, 29  Next
TheoM
KVRAF
- profile
- pm
PostPosted: Sun May 13, 2012 7:46 am reply with quote
Kriminal wrote:
ariston wrote:
Did anyone mention yet that this thread and its devious little intentions are utterly repugnant?

And the sad fact is, most consumers couldn't care less about the tech behind the scenes. We have ears, and we have experience, and no amount of thinly-veiled sand-kicking or pseudo-scientific testing will change that.

Respect to Xavier for his great work, I would very likely already own all three Xils synths were it not for ye dongle (no, I don't appreciate cut-down versions, I want the real deal). But maybe he should get someone else to do his "marketing" here, this boatload of half-digested crap must be hurting the business by now.


Well Done


That is absolute and utter BS and it is members like the two of YOU who are derailing the thread.

There was no hidden meaning or trouble making here, it was simply an informational service to explain what these filters are all about and how you can test if your synth has them.

it is THAT simple...

everyone ELSE is turning it into a lotuzia hate fest and i am f**king tired of it.

Totally un called for behaviour.

Thanks for the information Lotuzia Thumbs Up!

Don't know whether it's correct or not as i am not technically minded like this but i did find it interesting nevertheless Smile
----
Please call me Theo.
^ Joined: 04 Sep 2001  Member: #1049  Location: Melbourne Australia
TheoM
KVRAF
- profile
- pm
PostPosted: Sun May 13, 2012 7:48 am reply with quote
ariston wrote:
kmonkey wrote:
Some really really weird individuals with weird intentions here. I don't get it. OP clearly stated what this thread is about. I am bad at english but even i could get it.


The problem is not the content of the message, it is the intention. This is a "thing" that has been festering over several threads for months now, and if you haven't caught up with that then I appreciate you not knowing what "it" is all about. I won't rehash it now, the individual in question knows what "it's" about, and methinks he doth protest too much. But if you like to be fooled by that, then go ahead.

Once again, I'm not debating the content. Now let's hear some audio examples of your tests.


there is no hidden intention other than the one you are creating.. and i have read ALL the back stories and topics related to what you are insinuating.. So please STOP trolling an information thread!
----
Please call me Theo.
^ Joined: 04 Sep 2001  Member: #1049  Location: Melbourne Australia
hakey
KVRAF
- profile
- pm
- www
PostPosted: Sun May 13, 2012 7:53 am reply with quote
Disinformation thread. Wink
^ Joined: 25 Feb 2008  Member: #174534  Location: Babylon an ting
TheoM
KVRAF
- profile
- pm
PostPosted: Sun May 13, 2012 7:54 am reply with quote
ps thanks for the reminder, just bought synthix, 20 seconds after i posted. What a great friggin synth! I am so glad i managed to sell a few things so i could get this! and Xavier provides amazing support and communications.

LONG LIVE THE DONGLE!
----
Please call me Theo.
^ Joined: 04 Sep 2001  Member: #1049  Location: Melbourne Australia
ariston
KVRAF
- profile
- pm
- e-mail
- www
PostPosted: Sun May 13, 2012 10:30 am reply with quote
ttoz wrote:

there is no hidden intention other than the one you are creating.. and i have read ALL the back stories and topics related to what you are insinuating.. So please STOP trolling an information thread!


Well, someone's lost his pacifier and is a bit cranky, it seems.

FYI: I did stop. You dragged it back up, days later I might add, and obviously felt that your opinion was so desperately needed that it required two posts. How does it feel to troll and obscure an information thread by accusing someone else of trolling? Can you spell "hypocrite"?

You don't see a hidden intention, I do. You can unclench your butt cheeks now, it's only a difference of opinion.

edit: Damn, broke my promise. See what you made me do? Well, back to anger-management classes.
^ Joined: 28 Jun 2009  Member: #210358  Location: in a one-story town
TheoM
KVRAF
- profile
- pm
PostPosted: Sun May 13, 2012 10:45 am reply with quote
I didn't see that it was days ago, in that case i am sorry. I honestly just saw fresh posts and did not think to look at your particular posting date. That is no BS, that is true.

Peace.

I do really feel Laurent was only at least trying to be helpful though..,

ok, going back to enjoy my synthix.. wow Shocked
----
Please call me Theo.
^ Joined: 04 Sep 2001  Member: #1049  Location: Melbourne Australia
ariston
KVRAF
- profile
- pm
- e-mail
- www
PostPosted: Sun May 13, 2012 11:04 am reply with quote
ttoz wrote:
I didn't see that it was days ago, in that case i am sorry. I honestly just saw fresh posts and did not think to look at your particular posting date. That is no BS, that is true.

Peace.

I do really feel Laurent was only at least trying to be helpful though..,



Okay, fair enough, no harm done.
I still don't quite see the point of it all, beyond the fact that we've only been talking about 0 delay FB filters ever since you-know-who released you-know-what. It has been remarked that this proposed test is far from conclusive; I tend to agree. By this test, Z3ta2 has 0dfbfs. Does that even mean anything? The only software filters I've heard so far that are even close to you-know-what are the audio demos of the upcoming The Drop.
And, in the end, it's all about the sound. I might be curious as to the tech (just so I can bore my wife with the details), but it's all just numbers, innit? Isn't that why we pay talented devs like Urs and Xavier, so we don't have to worry about it?
^ Joined: 28 Jun 2009  Member: #210358  Location: in a one-story town
rod_zero
KVRist
- profile
- pm
PostPosted: Sun May 13, 2012 11:16 am reply with quote
The point here is very simple:

Does the test can prove with 100% accuracy that a synth use zero delay filters?

If not, why?

Was the test designed to prove synths using one method and discriminate others?

Or, how many ways are there to "pass this test" using other methods?
----
dedication to flying
^ Joined: 28 Jan 2011  Member: #248997  Location: MEXICO
hakey
KVRAF
- profile
- pm
- www
PostPosted: Sun May 13, 2012 11:38 am reply with quote
rod_zero wrote:
Does the test can prove with 100% accuracy that a synth use zero delay filters?

No. It's next to useless - many standard, non-0df filters will "pass" the test.
^ Joined: 25 Feb 2008  Member: #174534  Location: Babylon an ting
kv331
KVRAF
- profile
- pm
- www
PostPosted: Sun May 13, 2012 11:40 am reply with quote
aciddose wrote:
problem with zero-delay filters is they don't solve the aliasing issue. it still requires massive over-sampling of about 8x-16x to get anywhere near where you want to be. by that time the filter is so expensive you might have considered using an analog one instead.


I havent played with ZDFs yet, but if they will still require high oversampling rates (>= x4), then in that case why would I use them? Because if there's oversampling (>=x4), then that'll compansate for the z-1 delay/phase errors to a certain extend, as nyquist frequency is divided by the oversampling factor... Please correct me if I am wrong guys!

Bulent
----
SynthMaster 2.6 VST/AU/RTAS
"The Best Software Instrument of 2012" Award by MusicRadar
CM Review: 10/10, Beat Review: 6/6
http://www.synthmaster.com/synthmaster.aspx
^ Joined: 14 Nov 2006  Member: #128384  Location: Ankara, Turkey
kv331
KVRAF
- profile
- pm
- www
PostPosted: Sun May 13, 2012 11:50 am reply with quote
hakey wrote:
rod_zero wrote:
Does the test can prove with 100% accuracy that a synth use zero delay filters?

No. It's next to useless - many standard, non-0df filters will "pass" the test.


Yes, as long as they are designed correctly.
----
SynthMaster 2.6 VST/AU/RTAS
"The Best Software Instrument of 2012" Award by MusicRadar
CM Review: 10/10, Beat Review: 6/6
http://www.synthmaster.com/synthmaster.aspx
^ Joined: 14 Nov 2006  Member: #128384  Location: Ankara, Turkey
hakey
KVRAF
- profile
- pm
- www
PostPosted: Sun May 13, 2012 11:55 am reply with quote
kv331 wrote:
I havent played with ZDFs yet, but if they will still require high oversampling rates (>= x4), then in that case why would I use them? Because if there's oversampling (>=x4), then that'll compansate for the z-1 delay/phase errors to a certain extend, as nyquist frequency is divided by the oversampling

When you say ZDFs are you thinking about zero delay filters or zero delay *feedback* filters?

From what I understand, in the second case 0-delay makes a considerable difference as the effect of nonlinearities (=feedback) can be more accurately modelled.
^ Joined: 25 Feb 2008  Member: #174534  Location: Babylon an ting
kv331
KVRAF
- profile
- pm
- www
PostPosted: Sun May 13, 2012 11:59 am reply with quote
hakey wrote:

When you say ZDFs are you thinking about zero delay filters or zero delay *feedback* filters?

From what I understand, in the second case 0-delay makes a considerable difference as the effect of nonlinearities (=feedback) can be more accurately modelled.


I think (!) meant zero delay feedback filters, where you get rid of z-1 in the feedback loop.
----
SynthMaster 2.6 VST/AU/RTAS
"The Best Software Instrument of 2012" Award by MusicRadar
CM Review: 10/10, Beat Review: 6/6
http://www.synthmaster.com/synthmaster.aspx
^ Joined: 14 Nov 2006  Member: #128384  Location: Ankara, Turkey
hakey
KVRAF
- profile
- pm
- www
PostPosted: Sun May 13, 2012 12:11 pm reply with quote
From what I understand, the problem is that in a real electrical circuit any feedback between input and output is instantaneous.

However, a digital model with 1-sample delay feedback uses the output from the last iteration as the input for feedback in the current iteration - ie it fails to model the effect of instantaneous feedback.

In contrast, a 0-DFb filter effectively uses the output from the current iteration as the input for feedback in the current iteration, and so models instantaneous feedback.
^ Joined: 25 Feb 2008  Member: #174534  Location: Babylon an ting
brok landers
KVRAF
- profile
- pm
- www
PostPosted: Sun May 13, 2012 2:06 pm reply with quote
Arksun wrote:
izonin wrote:
Arksun wrote:
My idea of a good filter, I press a note on the keyboard, I hear the sound, it sounds good to my ears. That's a good filter.

It sounds unpleasent to my ears, its a bad filter.


Do some tests with Diva in draft and divine mode. Might notice something you weren't aware of before. The z-1 draft has this comic/cartoony quality to it, while the zdf divine sounds more audio-realistic.


I am very aware of the difference in sound of the filter in Diva at different quality settings, particuarly the difference between draft - fast/great/divine. No additoinal tests required Smile

My point is that for me personally I really don't care what goes on under the hood, unless its part of a bug solving thing for example if there was say a DC offset issue with a synth I might analyse n try and help the developer get to the root of the problem.

I will also go one step further and say that for some particular types of sounds, draft mode in Diva works can work better than the higher quality modes. And by better I mean in getting a particular kind of sound suited to genre and taste, not authenticity to some old vintage piece of equipment.

One mans awesome bright trance lead is anothers horrible plasticy lifeless sound, and vice versa. To argue that one particular way is the 'correct' way when it comes to something as subjective as sound and music in this instance is a bit silly. Maybe something as obvious as hideous amounts of aliasing sure, but this is different in my view.

For example, BigTones presets were designed in draft and thus to work at their intended filter response ideal in draft mode .But again its a matter of taste, we have the choice, of multiple quality settings, which is a nice touch.

There are times I want a really organic filter sound that sounds like its running through big chunks of hardware, and there are times I want a glassy pure filter sound, or a very resonant sharp filter sound, or a warm but very smooth analog/digital hybrid sound, or a very bright digital filter sound. Depends what mood I'm in, what I'm trying to accomplish, how I feel it'll suit a sound in a particular mix. No right or wrong way here.

Got nothing against marketing, its part of business, and it works, I'm just saying for me personally, I just play, I just listen, if I like the sound of it, thumbs up from me.

this summs it up rather nicely, imo.
also, i don't know, but i assume that the difference between draft and the higher quality modes in diva are not only the zero delay fb-mode, but way more enhancements, so i don't know if the comparsion between draft an the high q-modes fits clothes... i could be wrong on this though...
----
reg, the brok

-gear is as good as the innovation behind it-the man-
^ Joined: 25 Sep 2003  Member: #9331  Location: right here, as you can see ...
All times are GMT - 8 Hours

Printable version
Page 6 of 29
Goto page Previous  1, 2, 3 ... 5, 6, 7 ... 27, 28, 29  Next
Display posts from previous:   
ReplyNew TopicPrevious TopicNext Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
Username: Password:  
KVR Developer Challenge 2012