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DPChallenge Forums >> General Discussion >> Is this logical?
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11/02/2007 10:15:12 PM · #1
I'll admit I'm more of an audiophile then a Photographer..

But I have to ask, when looking at my EQ, it looks alot like a histogram..

So are there really some equal values? --

Are my High's White points, is the bass my Black Levels?

Are my midtones the same middle points in a audio spectrum?

I have no problem tweaking my music, Is there any value relating this to Pictures? Just wondering..

11/02/2007 10:21:57 PM · #2
Interesting you mention that. Here's a shot of the 'Light EQ' tool in ACDSee. Works in a very similar way to an audio EQ.



So what you're saying does sound logical.
11/02/2007 10:27:19 PM · #3
I think there's a correlation:

On the histogram, the high-end is white, and the low end is black. If your data was spread to the far left and right, you'd have a lot of contrast. If it was mostly in the middle, it be muddy-gray.

On the equilizer, the high-end is high frequency (high treble) and the low-end is low frequency (low bass). If you have a lot of separation in the audio, there is a lot of contrast in the spectrum (between highs and lows - imagine a nice bass guitar with a contrasting crisp high-hat). But if it were cranked in the middle, it's be muddy and sound like it's coming through a 1970's telephone.

In general, I think the brain enjoys a "nice" amount of contrast, in both audio and visual spectra. The contrast represents order in what would otherwise be random chaos (gray, muddy, noise).

My 2 cents. =)

Message edited by author 2007-11-02 22:28:25.
11/02/2007 10:38:14 PM · #4
Yes, if you look at the readouts from an equalizer, the trebles are at the right and basses on the left; the meters will form a histogram of the strength of the sound at each tone range. With analog (tape) recording, there is an even greater need to boost the bass and treble ends while mitigating the midtones to make up for the loss which occurs in the recording process, and for the age-related degredation of human hearing.

Putting the equalizer sliders in some sort of "U"-shape configuration is essentially the same as applying an "S"-shaped Curve in Photoshop or, as you mention, bringing in the highlight and shadow sliders in Levels -- essentially to are extending the tone range and improving the "contrast."
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