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apQualizr2 apQualizr2 apQualizr2 apQualizr2
apQualizr2 by apulSoft is a Virtual Effect Audio Plugin for macOS and Windows. It functions as a VST Plugin, an Audio Units Plugin, a VST 3 Plugin and an AAX Plugin.
Windows 7 or newer.
A CPU with SSE 2 support.
A host application that can load VST, VST3 or AAX plugins.
A Mac with an 64-bit Intel/Apple Silicon CPU running OS X 10.11 or newer.
A host application that can load VST, VST3, AU or AAX plugins running in 64-bit mode.
Pro Tools (AAX): Pro Tools 11 or newer including Apple Silicon native.
Copy Protection
Serial Number
My KVR - Groups, Versions, & More
83 KVR members have added apQualizr2 to 37 My KVR groups 101 times.
Not In Your MY KVR Groups
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+37 in private groups

KVR Rank

Overall: 612   480   603

30-Day: 552; 7-Day: 1070; Yesterday: 797

apQualizr2 is an audio plugin based on a multiband equalizer layered on top of a frequency analyzer with elements of a modular effects system.

It features graphical editing of top quality low latency filters and modular modulation of various filter parameters. It can be used for all standard EQ applications and can produce many modulation/dynamics effects thanks to the dynamics and LFO modules included.

Main features:

  • High-quality minimal latency variable poles filters modeled perfectly over the full frequency spectrum.
  • 4 phase correction engines: minimal, analog, mixed, and linear.

  • Graphical editing of filter parameters.
  • Unlimited number of filter bands.
  • Zoomable FFT-based frequency analyzer displayed beneath the filter curves.
  • Undo/Redo support for all actions.
  • Frequency band solo feature: hold [Alt] to solo frequencies in mouse proximity at any time.
  • Filter parameters can be modulated by a configurable network of modules.
  • Current module selection: LFO, Dynamics Detector, Signal Scope, Mix, Split, Knobs.
  • Sidechain support using a dedidcated sidechain module.

  • LFO multi-segment curve editor with unlimited control points and host time sync.

  • Mid-Side / Left-Right processing per filter band.
  • Comb filter.
  • Spectral tilt filter with freely adjustable slope.
  • Variable slope high- and low pass filters.
  • Harmonic filterbanks with peak, parallel bandpass, and notch bands.
  • Output clipper with gain reduction graph and antialias algorithm.
  • Interactive piano ruler.

Latest User Reviews

Average user rating of 5.00 from 3 reviews

Reviewed By Nollidw [all]
May 19th, 2024
Version reviewed: 2.7.0 on Windows

One of my favorite plugins at the moment. I would seriously recommend trying this eq out compared to others as it lets you do so much more than a lot of other eqs with a simple, clean design. You can even add modulation, panning, sidechaining, and so much. Amazing dev, amzaing plugin. Can't wait for more.

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Reviewed By Aledes [all]
September 16th, 2023
Version reviewed: 3 on Mac

This is one of the best, or maybe... the best eq... I don't know but..., it can be used for creative effects, modulation, for mixing, for mastering, in linear phase, it has clipping options, dynamic compression, and now in the last update with the side chain option, it has it all... it's perfectly powerful.

Thanks Apulsoft.

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Reviewed By alwinbrauns [all]
August 24th, 2018
Version reviewed: 2.2 on Windows

This is the best Equalizer I know!

It is not only an EQ! With the modular-system you can easily build a... :

  • De-Esser.
  • Dynamic EQ.
  • Auto-Pan.
  • Auto-Filter.
  • Compressor.
  • and much more.

The prize is very low for what you get!.

There are always incredible good updates.

This plugin uses the advantages of digital!!!! Not a "magical" analog eq for 200$, it is a futuristic EQ! No magic bullshit, this EQ is on point!!!

The only contra is that beginner maybe struggle with the modular routing. But even without using the moduls it worth its price!!!.

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