Duoflux

Name: Duoflux
Price: 79 USD
Author: United Plugins

by United Plugins · Modulation · Dual-engine modulation

Not rated yet

Duoflux from Soundevice Digital (sold by United Plugins) splits the signal into two units, each running one of 17 modulation effects such as chorus, ensemble, rotary, tremolo and phaser.

The split can be by frequency, level, stereo or mid/side, with tape wow and flutter on top; $89.

Best for: Keys & Synths, Guitars, Vocals, Sound Design. Genres: all genres.

Keywords: chorus, tape, tremolo, phaser, rotary, subtle, flutter, wobble, hardware emulation, mid/side, vocals, electric guitar, keys, mixing, undo/redo, A/B compare, multi-band, musical, oversampling, piano, sound design, spacious, pads, vibrato, vintage, wide.

What it does

Duoflux is a dual-engine modulation plugin by Soundevice Digital, sold by United Plugins. It splits the signal in two and runs a separate modulation effect on each part, with tape-style saturation on top.

Four split modes: frequency (low/high, with an adjustable crossover), volume (quiet/loud), stereo (left/right) and mid/side.
17 algorithms per unit: including vintage chorus, ensemble, two rotary speakers, tremolo, vibrato, phaser and high- and low-pass filters.
Unit controls: Rate, Depth, Width, Feedback and an algorithm-specific Character control, plus high- and low-pass filters on each unit.
LFO shape: morphs continuously from sine to square, with an invert option.
Tape section: Saturation, Wow, Flutter and Noise per unit.
Workflow: lock buttons that keep an engine's settings while you change presets, A/B comparison, undo/redo, up to 8x oversampling, smart bypass and sleep on silence.

The current version is 1.3. Updates are free for life, and a free 15-day trial runs with no saving or feature limits.

Source: United Plugins product page

When to use it

Duoflux is the pick for layered, two-part modulation in one plugin, such as chorus on the sides and tremolo on the lows, or a different effect on loud and quiet passages. Compared with MicroShift and PhaseMistress, it covers many more effect types, but each one is less refined than those dedicated tools. Unlike ShaperBox 3 and LFO Tool, it is not built for tempo-synced rhythmic shaping; its focus is classic chorus, rotary, phaser and tremolo colour. Its tape section also adds saturation, wow and flutter, which MicroShift and PhaseMistress don't offer.

Best for: subtle chorus, phaser, rotary and tremolo textures on pads, keys, bells, pianos, guitar chords and vocals.
Genres: pop, electronic, ambient, lo-fi and rock.
Look elsewhere if: you want tempo-synced rhythmic shaping (ShaperBox 3 or LFO Tool) or one top-quality chorus or phaser (MicroShift or PhaseMistress).
Tip: keep the rates low for understated results, and go easy on the Noise control, which reviewers found strong.

What producers say

Reviewers like its subtle, musical results, with some doubts about the quality of each single effect.

Sound On Sound found the two engines give "lovely results" and said it provides "subtle, classy enhancement", praising the routing modes, lock buttons and built-in tape emulation.
Mixing.co.kr praised the four splitting modes, especially the quiet/loud split, and the tape character, but felt the single effects don't match dedicated plugins.
Criticisms: many knobs for beginners, few presets, and a Noise parameter that "can be somewhat excessive" (Mixing.co.kr).

Where to buy

Tutorials and reviews

Similar plugins

Godfazer by D16 Group · Modular modulation multi-effect · $69
Orbitron by United Plugins · Quad morphing modulator · $115
RP-Amod by Rob Papen · Phaser, flanger, chorus, ensemble and tremolo · Free
Module8 by Solid State Logic · Modulation effects rack · $29
Effects Series - Mod Pack by Native Instruments · Modulation effects pack · $49
Aurbit by Sixth Sample · Chorus, flanger and phaser · $34.01
Spinn by Klevgrand · Multiband rotary modulation · $49.99
SphereQuad by W.A. Production · Modulation multi-effect with filter sequencer · $59
Efx MOTIONS by Arturia · Rhythmic modulation effect · $79
VectoMelt2 by Psychic Modulation · XY wow/flutter multi-effect · $64

All modulation & movement