million dollar scientific EQ ? [Thread from 2007 bumped]
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- KVRist
- Topic Starter
- 123 posts since 9 Jan, 2006
Hello guys & gals !
I'm looking for an EQ with the steepest possible curve
and the ability to choose very precisely the HZ limit.
Ex : if i choose to cut exactly below 72 HZ, i'd like no 71 HZ at all in the resulting sound.
look at my little drawing :
any exact recommendation ? thanks !
best regards,
DRDRDR
I'm looking for an EQ with the steepest possible curve
and the ability to choose very precisely the HZ limit.
Ex : if i choose to cut exactly below 72 HZ, i'd like no 71 HZ at all in the resulting sound.
look at my little drawing :
any exact recommendation ? thanks !
best regards,
DRDRDR
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- KVRAF
- 4669 posts since 26 Sep, 2005 from U.A.E
Perhaps a filter like betabugs bugpass would be better...?
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- KVRAF
- 2472 posts since 15 Apr, 2004 from Capital City, UK
check out SpaceBoy's FreEq Boy (not free but darn cheap)
http://www.elevayta.net/product3.htm
it might not have the frequency resolution you desire though..
http://www.elevayta.net/product3.htm
it might not have the frequency resolution you desire though..
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tony tony chopper tony tony chopper https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=3103
- KVRAF
- 3561 posts since 20 Jun, 2002
note that an EQ with the steepest slope does NOT sound good
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- KVRian
- 873 posts since 16 Dec, 2004
http://www.kvraudio.com/get/2671.html
ReaFIR should do what your looking for (and then some).
http://img228.imageshack.us/my.php?image=refiroq0.jpg
ReaFIR should do what your looking for (and then some).
http://img228.imageshack.us/my.php?image=refiroq0.jpg
Last edited by Cyrosis on Tue Apr 03, 2007 11:54 pm, edited 1 time in total.
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- KVRAF
- 1868 posts since 26 Oct, 2002 from San Francisco
Nice picture
Stack a bunch of filters with the same settings on them, I'm pretty sure the way it works is that each one will make the q steeper. At least I think that's what I heard.
Stack a bunch of filters with the same settings on them, I'm pretty sure the way it works is that each one will make the q steeper. At least I think that's what I heard.
- KVRAF
- 6478 posts since 16 Dec, 2002
I haven't actually seen any proper linearphase 100dB super drops available as plugins yet. I've been playing with them in matlab, using as steep slope a 64bit math gives in. Fun toys and weird sounding as it will simply KILL everything below/above a certain point.
Can't see much use for one outside research. I seem to recall they had a gaussian one (also from matlab) in some early nebula beta as the volterra algorithm precision tester.
Can't see much use for one outside research. I seem to recall they had a gaussian one (also from matlab) in some early nebula beta as the volterra algorithm precision tester.
Last edited by Kingston on Tue Apr 03, 2007 11:55 pm, edited 1 time in total.
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- KVRAF
- 4669 posts since 26 Sep, 2005 from U.A.E
isnt the idea to achieve a balance in the time and frequency domains>?
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- KVRian
- 562 posts since 13 Aug, 2005
Voxengo Redunoise (with noise reduction disabled) might get you pretty close:
http://www.kvraudio.com/forum/viewtopic.php?t=173508
http://www.kvraudio.com/forum/viewtopic.php?t=173508
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- KVRAF
- 2049 posts since 18 Sep, 2003 from Seattle USA
Electri-Q has steep 82db/oct slopes or something like that...
FreEQ Boy lets you import a text file that can say something like 72Hz == 0db, 71 Hz == -120db. It's a steep thing - I forget exactly the format but I've used it and it is a steep one 96db/oct or something to that affect.
For the million dollar EQ with 130/db slopes or whatever, you might need a cement lined 1Km circular FFT buried under your house (or better yet the guys house next door, I think they're radioactive ).
FreEQ Boy lets you import a text file that can say something like 72Hz == 0db, 71 Hz == -120db. It's a steep thing - I forget exactly the format but I've used it and it is a steep one 96db/oct or something to that affect.
For the million dollar EQ with 130/db slopes or whatever, you might need a cement lined 1Km circular FFT buried under your house (or better yet the guys house next door, I think they're radioactive ).
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- KVRAF
- 4669 posts since 26 Sep, 2005 from U.A.E
FFT is probably the better choice over IIR in terms of slope steepness.
- KVRAF
- 2488 posts since 2 Dec, 2004 from Sydney, Australia
blocc hiPass and blocc loPass - both with 192 db/Octave(!) is all you ever need.
I wouldn't use an FFT based EQ, they often introduce artefacts.
Just my 2C: the way you'd like to cut off frequencies would make any sound most unnatural. I'm not sure if this analogy makes sense, but when doing picture manipultation or collages where you insert elements of another picture into your composition, you'd leave a feathered/antialiased edge as well to make elements blend in together, even if its 1 pixel. This 1 pixel could be referred to the dB/Octave in the audio world. You'd need to leave some feathering into other areas to blend in with the rest.
I wouldn't use an FFT based EQ, they often introduce artefacts.
Just my 2C: the way you'd like to cut off frequencies would make any sound most unnatural. I'm not sure if this analogy makes sense, but when doing picture manipultation or collages where you insert elements of another picture into your composition, you'd leave a feathered/antialiased edge as well to make elements blend in together, even if its 1 pixel. This 1 pixel could be referred to the dB/Octave in the audio world. You'd need to leave some feathering into other areas to blend in with the rest.
Cowbells!
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Christian Budde Christian Budde https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=25572
- KVRAF
- 1538 posts since 14 May, 2004 from Europe
To have an infinite steep filter you'd need infinite time! Or in other word's it is not possible. You always have to truncate and with this you'll face the uncertainty relation. Either you'd have a good frequency resolution (e.g steep cutoff) or you'll have a good time resolution (think of transients). All FFT based filters may have a perfect curve exactly *AT* the bins (which are displayed), but usually you can't say what's in between (ripple). If you use a window function you could smooth the frequency response by the expense of ripple in the time domain.
It's the same trade-off with IIR filters. Either you use an elliptic or chebyshev filter (which means ripple in the frequency response), or something like bessel/butterworth (less steep->you'll need a higher order->ripple in time domain).
This is the scientifical point of view. The musical point of view is, that it sounds bad. It's really sounds too artificial. It's because your ear normally doesn't expect such sharp filters (there are no discontinuities in the nature!)
Some ideas,
Christian
Btw.: Electi-Q also has the Bugpass integrated and offers up to 108 dB/Oct Butterworth filters. It would also be possible to supply any other (higher) cutoff, but it really doesn't make sense.
But if you'd really want to offer a million dollar...
It's the same trade-off with IIR filters. Either you use an elliptic or chebyshev filter (which means ripple in the frequency response), or something like bessel/butterworth (less steep->you'll need a higher order->ripple in time domain).
This is the scientifical point of view. The musical point of view is, that it sounds bad. It's really sounds too artificial. It's because your ear normally doesn't expect such sharp filters (there are no discontinuities in the nature!)
Some ideas,
Christian
Btw.: Electi-Q also has the Bugpass integrated and offers up to 108 dB/Oct Butterworth filters. It would also be possible to supply any other (higher) cutoff, but it really doesn't make sense.
But if you'd really want to offer a million dollar...