Old 01-24-2012, 07:35 AM   #1
K8ch
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Default Filter or EQ? Basically the same thing?

Hi,


First of all...I LOVE this group and I'ver really learned a lot from you folks!!


Okay...here's my question.
If I want to high-pass a signal at, let's say, 60 Hz, is it better to use a filter, or an shelf EQ? Does it matter?

I appears as though a filter is nothing nore than an EQ, but are there some subtle differences that would make on preferable or more appropriate a choice?


I'd be curious to hear your opinions.



Peace,

K8ch
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Old 01-24-2012, 07:54 AM   #2
TMA
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An eq is a bunch of filters essentially yes.

You get transparent ones and coloured ones just like you do with eq plugins.

Use whatever feels best for the task at hand i say.
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Old 01-24-2012, 01:32 PM   #3
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I am not sure, but I think that a filter will filter out all of the frequencies according to its settings. And an EQ will reduce the volume of the frequencies within a frequency band.

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Old 01-24-2012, 01:34 PM   #4
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ALL EQs are filters. Not all filters are EQs. A highpass
filter at 60Hz is going to pretty much be the same as
a shelving EQ at 60Hz. However, most filters you can adjust
the slope but most EQs don't have a slope adjustment.

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Old 01-24-2012, 01:49 PM   #5
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Do these look the same to you???

[IMG]http://img268.**************/img268/1628/thefilter.jpg[/IMG]


[IMG]http://img31.**************/img31/4289/theequaliser.jpg[/IMG]
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Old 01-24-2012, 02:34 PM   #6
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The Equalizer!That was GOOD tv.
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Old 01-24-2012, 05:18 PM   #7
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Quote:
Originally Posted by Jedi View Post
A highpass filter at 60Hz is going to pretty much be the same as a shelving EQ at 60Hz. However, most filters you can adjust
the slope but most EQs don't have a slope adjustment.

Jedi
A steep highpass can be pretty dramatic sounding, unlike your everyday shelving filter. It will usually bring some degree of resonance around the cutoff freq. Not so with shelves, unless you really push them. You can dip a shelf only -0.2 dB at 60hz if you like. You can also boost shelves, something that is impossible to do with pass filters.

Pass filters generally affect the sound and especially the phase a lot more than shelves. Another way to put it is that shelves are gentler sounding than hp/lp filters. To me anyway. I always try to get away with using mostly shelves, it just sounds more natural to me on most sources.

Also, some shelving filters actually have Q-values that will result in different shelving slopes.
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