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Difference Between EQ and Filter Effects Pedals, Units & Accessories
Old 25th August 2007
  #1
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Difference Between EQ and Filter

I mean isn't a filter kind of like the section of an EQ completely closed off?
Old 25th August 2007
  #2
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An 'eq' is generally a collection of filters. There are many different filter types: low pass, high pass, band pass, all pass, peak, shelf - just for starters.
Old 25th August 2007
  #3
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a filter can have harmonic resonance
Old 25th August 2007
  #4
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So can an 'eq' - Parametric EQs usually have a Q or Resonance control. A 5 band parametric eq is just 5 filters that let you adjust the parameters. A 32 band graphic eq is just 32 filters, with preset frequency and resonance.
Old 25th August 2007
  #5
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Quote:
Originally Posted by miqer View Post
a filter can have harmonic resonance
Sorry, I was a luddite up until last year.

What do you mean? How?
Old 25th August 2007
  #6
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EQ means equalizer and is made of filters. The filters can be of different shape and have different set of controls. When you have a very high and narrow peak at filter it tends to self resonate at that frequency (like most synth filters).
Old 25th August 2007
  #7
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Quote:
Originally Posted by soupking View Post
I mean isn't a filter kind of like the section of an EQ completely closed off?
A filter is removing certain frequencies.
A EQ will change the audiolevel of certain frequencies or audioband.
Old 25th August 2007
  #8
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Quote:
Originally Posted by 16/44.1 View Post
A filter is removing certain frequencies.
A EQ will change the audiolevel of certain frequencies or audioband.

Ohhhkay, I think the monkey gets it.

Like, the filter removes the section of the signal rather than simply reducing thusly affecting the overall overtone of the entire signal.

Am I warm?
Old 25th August 2007
  #9
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No. Stone cold, dead as a very dead thing, toe-numbing, cold-as-ice cold.
Old 25th August 2007
  #10
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Some clues.

Filters can have gain, which could be negative or positive.

Overtones or harmonics are the result of distortion - and of course these are higher frequencies that are generated by the distortion.

An eq/filter can remove frequencies, so obviously it can remove harmonics.

The primary purpose of an eq/filter is not to distort and create harmonics. However, due to the nature of circuits or algorithmns, distortions may occur or be induced. This may be a desirable component of the sound, but not the primary design purpose of an eq/filter.
Old 25th August 2007
  #11
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Quote:
Originally Posted by Kiwiburger View Post
Some clues.

Filters can have gain, which could be negative or positive.

Overtones or harmonics are the result of distortion - and of course these are higher frequencies that are generated by the distortion.

An eq/filter can remove frequencies, so obviously it can remove harmonics.

The primary purpose of an eq/filter is not to distort and create harmonics. However, due to the nature of circuits or algorithmns, distortions may occur or be induced. This may be a desirable component of the sound, but not the primary design purpose of an eq/filter.

K, So the purpose of using a filter rather than an EQ would be a question of distortion?
Old 25th August 2007
  #12
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Quote:
Originally Posted by 16/44.1 View Post
A filter is removing certain frequencies.
A EQ will change the audiolevel of certain frequencies or audioband.
Correction:

A low pass, high pass, or notch filter removes certain frequencies.
A Peaking or shelving filter (EQ) will change the level of certain frequencies.

EQ's are filters...just a different type than what is usually in the "filter section" of a console...I think this is where the confusion lies.
Old 26th August 2007
  #13
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Quote:
Originally Posted by soupking View Post
K, So the purpose of using a filter rather than an EQ would be a question of distortion?
Well if you want to be like that, all eq is a distortion. On reflection, let's just say that a filter is kind of like the section of an EQ that's completely closed off ... you win.
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