KVR Audio

bduffy · Post by **bduffy** » Thu Apr 05, 2007 3:36 am

kylen wrote:384db/oct - now that gets the audio steepness award I would think! That filter's so steep it goes all the way into tomorrow...

I can see the face of God...

kylen · Post by **kylen** » Thu Apr 05, 2007 4:02 am

Now that is a steep slope!

DRDRDR · Post by **DRDRDR** » Thu Apr 05, 2007 4:08 am

Very nice indeed, except for a few details :
-the GUI doesnt remember the settings. If you close the window without saving a preset, no way to find again the settings you had.
-when loading a second instance, it crashes :

Christian Budde · Post by **Christian Budde** » Thu Apr 05, 2007 4:12 am

Small update (still nothing special though)

rbet · Post by **rbet** » Thu Apr 05, 2007 4:28 am

Look what I received in my mailbox today!

WITH THE COMPLIMENTS OF ABDUL ABACHA

Hallo Sire,

I am Alhaji ado Abacha, son of the late Head DSP Scientist of the Federal Republic of Nigeria, General Sanni Abacha who died under mysterious circumstances on the 8th of June 2003. After the death of my father, myself and members of my family including my mother have been put through hell with interrogations, on account of corruption and mismanagement of DSP research funds by my late father. My father was a corrupted man (he also cheated on my mother) but a brilliant DSP programmer who developed the ultimate filter. He called it the "ZOMG Teh Filtar" for some reason which I don't know. Just before his personal library was confiscated and incinerated by the officials, I found the following document which may be the only written reference to its existence...

Shit, I am too excited to type the rest of the letter!

ouroboros · Post by **ouroboros** » Thu Apr 05, 2007 4:29 am

simple question:
when stacking, say 2 24db/oct eq one after the other, is the result one 48 or some other exponent? I guess this might create some phase problems, but I always forget the answer.

Christian Budde · Post by **Christian Budde** » Thu Apr 05, 2007 4:46 am

ouroboros wrote:simple question:
when stacking, say 2 24db/oct eq one after the other, is the result one 48 or some other exponent? I guess this might create some phase problems, but I always forget the answer.

More or less yes. Case both are from the same type (lowpass or highpass) you will result in 48dB/Oct. Phase doesn't matter here. But those 24db/oct you usually won't see at the edges of the filter. With a butterworth design its usually less, while a chebyshev design will have much sharper edges (at the expense of ripple in the frequency response). If you turn that little knob >0.5, the filter type is switched to chebyshev and you can control the ripple (0.5..1).

Btw. I think I fixed both bugs. Though I'm not sure, since I don't have a Cubase 3 here,

Christian

MaliceX · Post by **MaliceX** » Thu Apr 05, 2007 4:48 am

<90-deg angle in EQ graphs is mathematically impossible to transcribe in my opinion. (But it probably could be translated to have the under-slope coincident to the bottom, which would then invert to an upright trapezoid shape which is basically upside down that drawn shape)

Again, SONY PARAMETRIC EQ. Is there anything else like it?

kylen · Post by **kylen** » Thu Apr 05, 2007 5:05 am

rbet has proof of development of a "Top Secrat" coffee filter...

SideWalker · Post by **SideWalker** » Thu Apr 05, 2007 10:44 am

Christian, the order knob is slop right?, so in the order knob 64 is the max spin, whats the slop in 64?

Thanks

Christian Budde · Post by **Christian Budde** » Thu Apr 05, 2007 11:00 am

SideWalker wrote:Christian, the order knob is slop right?, so in the order knob 64 is the max spin, whats the slop in 64?

A second order lowpass filter means 12dB/Oct. And a 64th order filter equals 64/2*12dB/Oct = 384dB/Oct. Incredible, isn't it? However the Chebyshev works only up to an order of 40dB/Oct and even at that order you could clearly hear the numerical errors (quantization noise in the center of the combined filter)

loopdon · Post by **loopdon** » Thu Apr 05, 2007 11:02 am

nice one, christian!

SideWalker · Post by **SideWalker** » Thu Apr 05, 2007 11:15 am

thanks christian, its realy a good one!
i like it alot, i just moved this filter to my "QuickBox" vst folder

Cheers!

daverich · Post by **daverich** » Thu Apr 05, 2007 11:40 am

causes my computer to choke.

I do have a dualcore processor - maybe that's why?

Kind regards

Dave Rich

SideWalker · Post by **SideWalker** » Thu Apr 05, 2007 11:47 am

daverich, i have dualcore to, no problem here except it dosnt remember the settings every time i open the gui...

except that every thing is OK.

million dollar scientific EQ ? [Thread from 2007 bumped]