Logic Channel EQ not precise

[ferdik]

Hi! Old news but Logic Channel Eq is not able to do exact frequencies. For example it can't do the freq of the standard ISO 31 band EQ. It round off and jumps to other freq.

Is this hearable? For smaller steps, no. For bigger steps, yes. Is this annoying, yes. Can I go third party, I guess. But why does it behave like this in a PRO program? Must be a logic(!) explanation?

[antic604]

But why does it behave like this in a PRO program? Must be a logic(!) explanation?

Perhaps it's meant for broad-strokes / fast workflow rather than surgical sculpting? Many EQs - e.g. Pultecs - will even have 'notched' dials with discrete steps so that you have only so many choices, which narrows down the possibilities and forces you to make quick, ballpark decisions.

I don't think it has anything to do it being professional or not

[BertKoor]

Are you just doing it with mouse drag gestures? How much off are the frequencies?
Supposedly you can click on the numbers and key in any number.

For example it can't do the freq of the standard ISO 31 band EQ.

Never knew that was an ISO standard. Cannot find a reference to its number. But anyway, if you want the 31 bands of the ISO standard, you should insert a 31-band graphical EQ plugin. A channel strip EQ is not that. It's usually just a set of low & high shelves or HPF/LPF duo and one or two parametric bands. Different concepts...

With 31 bands you have a frequency resolution of 3 bands per octave. These bands are so wide that despite the label "63 Hz" it would not matter whether it's actually 58 or 68 Hz.

For a parametric EQ you'd like to dial in a specific resonance you want to tame down. Then any set of more than a hundred different frequencies spread logarithmically on the spectrum from 20 Hz to 20kHz would be enough.

Suppose there's a resonance at 98 Hz - that is a G note. If the Q is not set super narrow, then 95 or 101 Hz would work quite well. It does not need to be that precise, these frequencies are less than 50 cts off the exact tuning. Half a note down Gb is 92.5 Hz and upwards G# is 103.8 Hz.

[antic604]

Suppose there's a resonance at 98 Hz - that is a G note. If the Q is not set super narrow, then 95 or 101 Hz would work quite well. It does not need to be that precise, these frequencies are less than 50 cts off the exact tuning. Half a note down Gb is 92.5 Hz and upwards G# is 103.8 Hz.

Don't be silly. I'm sure the OP can hear such a discrepancy existing on a single track in full mix!

[Passing Bye]

Logic channel EQ is parametric, there's 10 band graphic one too, if you want 31 band graphic EQ, than get 3rd party one.

[EdgarRothermich]

Hi! Old news but Logic Channel Eq is not able to do exact frequencies. For example it can't do the freq of the standard ISO 31 band EQ. It round off and jumps to other freq.

Is this hearable? For smaller steps, no. For bigger steps, yes. Is this annoying, yes. Can I go third party, I guess. But why does it behave like this in a PRO program? Must be a logic(!) explanation?

Sorry, but I don't understand the problem.
An EQ is not a calculator to provide exact numbers unless you use it for scientific purposes. In audio production, you use mainly your ears.
Problem solved.

[Bug Music]

Look in Logic's effects menu under : "Audio Units > Apple > AUGraphicEQ"
It's one of Apple's internal AU's, and not an effect built into Logic itself.
There is a menu in the lower left to select either 10 or 31 bands.

Hopefully this helps.

- Jay