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Why can't I buy a 96 db hi/lo pass filter?

VST, AU, etc. plug-in Virtual Effects discussion

Moderator: Moderators (Main)

KVRAF
 
3648 posts since 8 Mar, 2004, from Berlin, Germany
 

Postby Robin from www.rs-met.com; Mon Feb 11, 2013 10:08 am

DaveGamble wrote:Sharper than Butterworth is the optimal Laguerre structure, which is monotonic, and very sharp


isn't that the papoulis-filter, you are refering to - also sometimes called legendre-filter? in my book, laguerre filters are filters that replace unit delays with 1st order allpasses (thereby achieving a warping of the frequency response).
Image
KVRian
 
747 posts since 30 Oct, 2005

Postby kvaca; Mon Feb 11, 2013 10:31 am

TheoM wrote:
kvaca wrote:
TheoM wrote:....Voxengo...it's a real shame he refuses to make a totally versatile all in one eq, only different ones that all miss necessary features.


off course its easily possible for him to do it that way ,but he apparently wants to sell more products instead of one totally versatile EQ :lol:
...are he is not the only one in this...


well does he even HAVE an eq with 48db filters?

probably not what you want,but Curve eq can be even steeper...fft based :wink:
KVRist
 
170 posts since 4 Apr, 2010
 

Postby earlevel; Mon Feb 11, 2013 11:23 am

kvaca wrote:probably not what you want,but Curve eq can be even steeper...fft based :wink:


I don't want to pre-supposed exactly what you're thinking here, but I've noticed what *seems* to be a supposition, at least a couple of times in this thread, that FFT filtering is sharper than other methods. But direct FFT filtering can only be as sharp as the resolution of the FFT, also taking into account the frequency spacing...Like I said, I don't want to "assume", but I'm wondering if people are making the mistake of confusing the characteristics of a single cycle FFT (for which you can zero any harmonics you want, exactly) with overlapped FFTs not locked to a cycle...

??
My audio DSP blog: earlevel.com
KVRist
 
170 posts since 4 Apr, 2010
 

Postby earlevel; Mon Feb 11, 2013 11:31 am

kvaca wrote:probably not what you want,but Curve eq can be even steeper...fft based :wink:


Also...I know nothing about Gliss, but for one thing I'd wonder if it's really an FFT-based analyzer with convolution filtering. Even if the convolution is done in the frequency domain (which is highly likely), I still wouldn't call that FFT filtering—but maybe you would, which is why I said I didn't want to make too many assumptions about what you mean...
My audio DSP blog: earlevel.com
KVRian
 
747 posts since 30 Oct, 2005

Postby kvaca; Mon Feb 11, 2013 11:49 am

earlevel wrote:
kvaca wrote:probably not what you want,but Curve eq can be even steeper...fft based :wink:


Also...I know nothing about Gliss, but for one thing I'd wonder if it's really an FFT-based analyzer with convolution filtering. Even if the convolution is done in the frequency domain (which is highly likely), I still wouldn't call that FFT filtering—but maybe you would, which is why I said I didn't want to make too many assumptions about what you mean...

probably you are right if you are talking about curve eq and not gliss eq...is it a typo above?

in any case Voxengo dont have any typical 48 db cut filters Theo is looking for...AFAIK curve eq is more or less freehand so you cannot exactly specify the slope of filter...at least in old version I have :)
Last edited by kvaca on Mon Feb 11, 2013 11:53 am, edited 1 time in total.
KVRian
 
835 posts since 12 Jul, 2009, from Cornwall
 

Postby DaveGamble; Mon Feb 11, 2013 11:52 am

Robin from www.rs-met.com wrote:
DaveGamble wrote:Sharper than Butterworth is the optimal Laguerre structure, which is monotonic, and very sharp


isn't that the papoulis-filter, you are refering to - also sometimes called legendre-filter? in my book, laguerre filters are filters that replace unit delays with 1st order allpasses (thereby achieving a warping of the frequency response).


Absolutely. Very sorry! Typo corrected! (and I've amended my previous post to avoid confusion).

Cheers!

Dave.
[ DMGAudio ] | [ DMGAudio Blog ] | dave AT dmgaudio DOT com
KVRist
 
170 posts since 4 Apr, 2010
 

Postby earlevel; Mon Feb 11, 2013 11:56 am

kvaca wrote:probably you are right if you are talking about curve eq and not gliss eq...is it a typo above?


Yes, sorry, just mixed that in with the references to Gliss in the thread, but I was making my guesses from a quick look at the CurveEQ product page :wink:
My audio DSP blog: earlevel.com
KVRian
 
1362 posts since 9 Dec, 2008, from Berlin
 

Postby ThomasHelzle; Mon Feb 11, 2013 12:11 pm

Image

http://www.rs-met.com/freebies.html -> EngineersFilter
As great as all his other plugins. 32 Bit only though AFAIK.

Cheers,

Tom
KVRAF
 
2618 posts since 15 Jan, 2005, from Ottawa, Ontario

Postby Debutante; Tue Feb 12, 2013 3:17 pm

Rubber filter
and the filter in REaplugs (fft)

both fall straight down
KVRAF
 
4098 posts since 15 Mar, 2008, from Czech republic
 

Postby MeldaProduction; Sat Feb 16, 2013 10:11 am

MDynamicEq - up to 120dB/oct, including shelves ;).

Image
KVRian
 
734 posts since 26 Jul, 2009

Postby olikana; Sat Feb 16, 2013 12:33 pm

Betabugs Bugpass
pretty much a vertical cut.
but a bandpass/notch so i guess doesn't count
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