Device Details


Overview

Name | Version: FREAK PASSIVE EQ 1.1
Author: eduardojuliato
Device Type: Audio Effect
Description: FREAK PASSIVE EQ v1.1

FREAK PASSIVE EQ is a two-band passive equalizer modeled after the broadcast-era LC topology that defined the analog mixing era of the 1950s and 1960s. Rather than approximating a single device, it reconstructs the full signal chain of a passive equalizer: input transformer coloration, an inductor-capacitor (LC) filter network, tube makeup amplification, and output transformer character, all rendered in a CPU-efficient hybrid DSP topology.

The result is a tonal tool that does what surgical parametric equalizers cannot: it shapes frequency response while simultaneously adding the harmonic complexity, gentle compression, and high-frequency softening that characterize analog signal paths.


Features
- 2-band passive EQ with authentic boost-and-cut interaction on the low band
- Built-in tube and transformer harmonic saturation
- 4× oversampled non-linear stage (alias-free harmonics)
- Sample-rate aware coefficient calculation (44.1k–192k)
- 6 fully automatable parameters with MIDI mapping support

Equalization stage

Low band — Frequency: 30–160 Hz · Boost: 0–12 dB · Attenuation: 0–12 dB

High band — Frequency: 3–16 kHz · Boost: 0–12 dB · Attenuation: 0–12 dB

Boost path: broad-bandwidth bell (Q ≈ 0.5) covering the full air region
Attenuation path: gentle high shelf with passive-style slope (S = 0.5)
Saturation stage (always active, 4× oversampled)

Asymmetric DC-biased polynomial waveshaper → generates even-order harmonics (tube-style coloration)
Soft-clipping with cubic shaping → generates odd-order harmonics (transformer-style coloration)
Anti-aliasing through 4× sample-rate oversampling on the non-linear stage

Sample-rate awareness
All filter coefficients are recalculated when the host sample rate changes, ensuring identical tonal behavior at 44.1 / 48 / 88.2 / 96 / 192 kHz.

Details

Live Version Used: 11.4.43
Max Version Used: 8.6.5
Date Added: May 27 2026 02:06:48
Date Last Updated: No Updates
Downloads: 0
Website: https://freakaudio.store/products/freak-passive-eq-max-for-live-plugin
License: None
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