SynthMaker

Im new & want to know how to create an EQ ?

Archive · 2011 12 old posts

From the original SynthMaker forum (2004–2014), with its members’ names and dates.

Jenifer ·

Hi im new & want to know how to create an EQ that mimics curve's that I have reference to, without any THD. Please teach me, thank you.

nix ·

Did you check the THD of the stock one in the toolbox? Is it capable of mimiciking your curves? I'm not really sure how to create an eq,sorry, but I have modded the stock one if you are interested?

oddson ·

I can't speak to THD with any certainty. AFAIK THD is a measure of the amount of added harmonic content (clipping of any kind will do this). But filters, if in their normal operating ranges shouldn't cause THD -- I think (I leave it to the audio geeks to correct me on this).

As for mimicking a given curve -- I think it would depend on the nature of the curve and the degree of required accuracy.

A flat line with a gradual tapering at, say 6dB per octave at one end should be more-or-less trivial. Complex shapes with steep shelves and minimal rippling in the pass-band is a whole different matter.

I'm pretty sure you'll need to be more specific.

infuzion ·

Welcome to SM Jenifer! You might be the first female poster here... 1 girl in 6 years...

Anyway: [old link] http://www.musicdsp.org/ then [old link] It is likely that there is the filter you want around the forum/WiKi though.

Jenifer ·

Hi how do I connect the stock eq (state var filter) to a fft display ? to take a look at the EQ curves ?

oddson ·

Here's the easiest way:

Of course you have to click the button to redraw. You can attach a tick25 (with a ticker divide if the number of samples is large -- the more sample the more FFT bins but the longer it takes). Or you can attach a trigger output from whatever filter controls you're using.

Jenifer ·

Thank you, I got it working ! 😀

Now anyone can help to explain what each line of the stock EQ does ? please teach me, thank you.

Mo ·

Jenifer wrote: Now anyone can help to explain what each line of the stock EQ does ? please teach me, thank you.

Do you mean the Parametric EQ in the toolbox? The Q control lines?

Jenifer ·

Yes ! to both.

Mo ·

They controls the width of the curve for each band.

Jenifer ·

nix please send me the modded stock EQ, thank you.

nix ·

pm sent 🙂

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