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EQ Plugin by platinumears
IQ4gui by platinumears is a Virtual Effect Audio Plugin for Windows. It functions as a VST Plugin.
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Imagine a standard compressor with a filter inserted in the side-chain, so that it only responds to certain frequencies. Now imagine that instead of controlling the overall gain of the signal, it only controls the volume of specific frequencies... you just discovered dynamic EQ - IQ4gui.

In other words, it can compress or expand specific frequencies in a similar manner to multi-band compression (but with a very different character) or it can de-ess, or perform more esoteric functions such as ducking one frequency when another is prominent.

You may find it easier to imagine the process as an automatic EQ, which can be used to cut a certain frequency only when it becomes a problem, or apply a boost only when that region isn't already loud enough.

While the audio signal passes through all four EQ bands in series, the side-chain filters are configured in parallel and are all fed from the main input, so changes to band one (for example) will not affect the amount of gain reduction or expansion applied by any other bands.


  • 4 identical EQ bands, switchable between shelving or peaking types.
  • 4 dynamics processing modes (up or down, compression or expansion).
  • RMS detection for musical dynamic shaping.
  • Separately tunable sidechain filters with side-chain listen option.
  • MS processing.
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Latest User Reviews

Average user rating of 4.00 from 1 review

Reviewed By megadeth
December 14th, 2010

You probably know multi band compressors ?
But you may know they mess the phase because they use crossovers to split frequencies, too...and are not very precise.

With this dynamic EQ, no more troubles like this.

You can be more accurate, because you set the exact frequency, not a band.
You can use low self, high self and peak EQ.
When the dynamic EQ is not triggered, your sound is NOT modified at all.
Unlike multi band, because they always split bands even not in use.
Much more respectful on acoustics instruments...and voice.
Voice is just horrible treated with multi band...

You want a de-esser ? It can do it with peak EQ in 3.5 - 5 kHz
You want to remove bass rumble ? It can do it with low self EQ starting at 80 - 120 Hz
You want to remove a spike in your signal ? Put a section in solo "Listen" mode, find the culprit and lower the threshold...

Possibilities are just infinite.

4 bands, solo listen, linked sidechain...and usual EQ and compressor settings.

Some presets are provided, for starter purpose.
You get a very complete manual too.

It never crashed.
GUI is nice.

Of course, the sound is very accurate.

Enter the dynamic EQ world for free now ;)
And forget multi band compressors :D
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Comments & Discussion for platinumears IQ4gui

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12 September 2015 at 9:42am

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