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Minimal Audio Morph EQ

Modulated Filter Plug-in By Paul White
Published October 2022

Minimal Audio Morph EQ

Looking to add movement to your sounds? Look no further!

To say the use of opening and closing filters as a dance‑music effect is ‘old hat’ may be doing a disservice to old hats, but Minimal Audio’s Morph EQ (which supports the common DAW plug‑in formats for Mac and Windows) breathes new life into this technique. Its filters are of the familiar parametric types, with variable frequency, Q and cut/boost parameters, along with alternative choices of high‑ or low‑cut, shelving and notch filters, so you can use it as a conventional EQ. But Morph EQ allows the user to set up dynamic morphs between any two EQ settings, with the morph acting on multiple bands simultaneously.

Overview

There are over 100 presets to get you started and most use eight filters or fewer, but you can add as many filters as you like; a double‑click creates a new one. Each filter can be given its own ‘Morph path’, which is linked to the plug‑in’s master Morph control, and any or all of their gain, frequency and Q parameters can be made to change. As the Morph control is turned, the filters move along the various paths you’ve defined. Each patch also has the choice of serial or parallel connection for the filters. So while you can still set up standard filter sweeps or even take a stab at a simple wah effect, the end result of more complex morphs can resemble anything from a talkbox to the whole sound being turned inside out!

The upper two thirds of the GUI is dominated by a spectrum analyser, overlaid with the filter curves and their trajectories, each shown in a different colour, with a thicker white line showing the composite filter response. On a parameter line directly below this, you can select which filter you are working on and what type it should be, along with its parameters. You can also specify for each filter whether it applies to the stereo signal, or just the Mid, Sides, Left or Right channels. You also get Undo and Redo buttons, along with a trashcan icon for deleting the currently selected filter or Morph point. The Adaptive EQ button forces the Q of a filter to adjust relative to its gain, so as to maintain a more even output level. A Solo button with a headphones icon allows the...

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