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Comb EQ Modular Synthesizers
Old 18th September 2011
  #1
Gear Maniac
 

Comb EQ

Dear GS,

After a good search i couldn't find what i'm looking for.
I'm searching for a good EQ that cut/boost like a comb.

So imagine that you low cut to 200 hz. Instead of cutting ALL the frequencies, you just get a sort of a comb cut. 12-db at 50hz, -6db at 100hz and -3db at 200hz. Does anyone know if there is a EQ who has this option without using 3 bands immediately?
Old 18th September 2011
  #2
Gear Addict
Quote:
Originally Posted by kdgh View Post
Dear GS,

After a good search i couldn't find what i'm looking for.
I'm searching for a good EQ that cut/boost like a comb.

So imagine that you low cut to 200 hz. Instead of cutting ALL the frequencies, you just get a sort of a comb cut. 12-db at 50hz, -6db at 100hz and -3db at 200hz. Does anyone know if there is a EQ who has this option without using 3 bands immediately?
A delay?
Old 18th September 2011
  #3
you feed a delayed version of the signal forward into the audio. imagine what that would do? it cancels out frequencies.
https://secure.wikimedia.org/wikiped...ki/Comb_filter
hardware
Tie Fighter Drums - Analogue Systems rs120 Comb Filter - YouTube

chorus, phaser and flanger effects are also combfilters.
BBD delays like that RS-120

would a bandpass/notch in the feedback/forward loop do some extra damage? if you use that with an audio delay and a mixer, you can feed a part of the signal to itself. just like Hannibal Lecter but then different.
Moulton Laboratories :: About Comb Filtering, Phase Shift and Polarity Reversal

a few and then controllable (in amount and q)
Cwejman synthesizers

more bands but static?
SND FB-14 special audio filterbank
or this?
Buchla 291 BPF Adaptation
orrrrrr
Graphic Equalizers GQX-Series Ashly Audio
urei 530 graphic EQ
UREI 535 - YouTube
Mister Graphic is VERY happy today...

even a mixer channel eq, ANY, can be delayed and fed for/backward to itself (using a second 2 in 1 mixer). how it sounds depends on the delay (shape, time (fast!), accurate or grainy), and the filters (shape, resonance, number, harmonic relation of the bands) obviously.

experiment!

Last edited by Reptil; 19th September 2011 at 12:19 AM.. Reason: clearer now
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