Arturia PolyBrute 12

Arturia PolyBrute 12 is a 12-voice polyphonic analog synthesizer with a 61-key keyboard featuring FullTouch® MPE technology, designed to offer an unprecedented level of performance expressiveness and timbral control. Its dual stereo filter analog architecture, continuous morphing between two sound states, advanced modulation matrix, and a system of multi-dimensional controllers make PolyBrute 12 an instrument conceived for sound designers, performers, and composers who demand total control over their musical gestures and sound.
Sound Architecture and Extended Polyphony
PolyBrute 12 expands the concept of an analog polysynth by bringing polyphony to 12 true voices. This architecture allows for the creation of complex harmonic structures, dynamic layering, keyboard splits, and impactful unisons, all while maintaining precise control over each voice. Each preset is built on two distinct sound states, A and B, each with its own synthesis and modulation configuration. This structure enables real timbral evolutions, not based on simple crossfades, but on structural transformations of the sound. Each voice is entirely analog and integrates two Brute oscillators with waveshaping, a continuous spectrum noise generator, and a dual filter system.
Brute Sound Engine and Filter Section
The analog engine uses classic Brute oscillators, capable of simultaneously generating multiple waveforms and being shaped via Metalizer, hard/soft sync, FM, and Brute Factor. The filter section combines a multi-mode Steiner Parker filter and a Ladder filter, usable in a stereo configuration. This architecture allows for timbral shaping ranging from soft, three-dimensional textures to aggressive, sculpted tones, always maintaining a coherent musical response.
Analog Brute Oscillators: Structure, Interaction, and Timbral Behavior
PolyBrute 12 uses a pair of analog Brute oscillators for each of the 12 voices, designed to operate as highly interactive timbral sources, not as static waveform generators. Each oscillator simultaneously generates sawtooth, triangle, and square waves, continuously blendable, allowing for timbre construction through harmonic layering rather than discrete selection. The triangular shape can be further transformed via Metalizer, a progressive wavefolding circuit that introduces upper harmonics in a controllable and musical way, always maintaining a consistent response even under deep modulations.
The sync section supports both hard sync and soft sync between oscillators, allowing for complex harmonic spectra, controlled sweeps, and unstable yet repeatable timbral behaviors. Frequency modulation can be applied using either an oscillator as an FM source or the noise generator, further expanding the timbral range towards metallic, percussive, or irregular territories. The entire oscillator section is designed to react fluidly to modulations from envelopes, LFOs, and expressive sources, including FullTouch, Morphée, and ribbon controllers, making sound generation an integral part of the performance gesture. In this context, pitch, harmonics, and spectral density are not static parameters, but dynamic elements that evolve over time, contributing significantly to the organic and three-dimensional character of the PolyBrute sound.
Analog Filter Section: Dual Architecture, Dynamic Behavior, and Stereo Management
The filtering section of the Arturia PolyBrute 12 is based on a dual analog architecture combining a 12 dB per octave multi-mode Steiner-Parker filter and a 24 dB per octave low-pass Ladder filter, both usable in a stereo configuration. This choice is not purely timbral, but structural: the two filters exhibit different dynamic behaviors under modulation and resonance, allowing for sound sculpting that goes beyond merely shaping the spectrum. The Steiner-Parker filter, selectable in low-pass, band-pass, and high-pass modes, is characterized by a rapid response and an aggressive yet controllable resonance, particularly effective on transients, articulated timbres, and fast modulations. The low-pass Ladder filter, on the other hand, offers a more progressive and dense response, with a natural saturation that can be emphasized by the drive circuit, ideal for full-bodied pads, structured basses, and evolving textures.
Both filters can be used in stereo routing, allowing for separate processing of the left and right components of the signal, or combined in series or parallel to achieve complex and three-dimensional responses. The cutoff frequency, resonance, drive, and relationships between the two filters can be deeply modulated via dedicated envelopes, LFOs, the modulation matrix, and expressive sources such as FullTouch, Morphée, and ribbon controllers. In this context, the filter does not act as a simple subtractive element, but as an active part of the sound's dynamics, capable of reacting to the performance gesture, key velocity, and the temporal evolution of the preset, contributing significantly to the organic character and spatial perception of the PolyBrute 12.
FullTouch® MPE Keyboard and Expressive Control
The expressive heart of PolyBrute 12 is the FullTouch keyboard, a proprietary technology that detects the key's position and velocity along its entire vertical travel. Three aftertouch modes are available: classic monophonic, polyphonic aftertouch, and FullTouch, which allows direct control of envelopes, modulations, and parameters through pressure and dynamic gesture. This approach allows for sound shaping without intervening on physical controls, making the keyboard an integral part of the synthesis process. Discover all the details about the 3 modes of the FULL TOUCH MPE keyboard on the Arturia PolyBrute 12.
Morphing and Timbral Macro-Control
Each PolyBrute 12 preset consists of two complete and independent sound states. The Morph control allows for continuous movement between these two states, simultaneously transforming multiple parameters and creating fluid and musical timbral evolutions. Morphing can be controlled manually or assigned to expressive controllers, becoming a central tool for performance and composition.
Modulation Matrix and Sound Design
The PolyBrute 12 Matrix offers an advanced modulation structure with 64 connections and up to 32 simultaneous destinations. The matrix allows for routing sources, controllers, and modulation generators to numerous parameters, creating complex and coherent modulation networks. Visual management via the grid makes the process immediate and oriented towards experimentation.
Sequencer, Arpeggiator, and Performance
PolyBrute 12 integrates a polyphonic sequencer up to 64 steps with parameter movement recording, transforming automations into true modulation sources. The multi-mode arpeggiator, integrated with the Matrix, allows for the creation of complex patterns, hybrids between sequence and arpeggio, particularly effective in live contexts.
Expressive Controllers and Physical Interaction
In addition to the FullTouch® keyboard, PolyBrute 12 offers the three-dimensional Morphée controller, an assignable touch-sensitive ribbon, and three pedal inputs (sustain and expression). These elements allow for multi-dimensional sound control, extending expressiveness far beyond the limits of traditional synthesizers.
Effects and Stereo Processing
PolyBrute 12 integrates 32 professional-quality stereo digital effects, including reverbs, delays, choruses, phasers, flangers, and distortions. Effects can be used as inserts, sends, or true bypass, and are modulable via the Matrix, further expanding sound design possibilities and spatial management.
Studio Integration and Software
The PolyBrute Connect software replicates the entire front panel as a standalone application and plug-in for major DAWs. Every parameter variation is mirrored in real-time between hardware and software, facilitating library management, preset import, and integration into production workflows.
Arturia PolyBrute 12 Technical Specifications
Type: polyphonic analog synthesizer
Polyphony: 12 voices
Keyboard: 61 velocity-sensitive keys with FullTouch® MPE technology
2 analog Brute oscillators per voice
Simultaneous generation of sawtooth, triangular, and square waveforms, continuously blendable
Metalizer (wavefolding) applicable to the triangular shape
Hard sync and soft sync between oscillators
Frequency modulation (FM) from oscillator and noise generator
Cross-modulation between oscillators
Control and modulation over pitch, waveform
Noise generator: continuous with variable color
Filters: Steiner-Parker multi-mode 12 dB + ladder low-pass 24 dB
Envelopes: 3 envelope generators
LFOs: 3
Modulation matrix: 12x32 with 64 connections
Sequencer: polyphonic up to 64 steps with motion recorder
Arpeggiator: advanced multi-mode
Effects: 32 stereo digital effects
Controllers: Morphée XYZ, ribbon controller, pitch wheel, mod wheel
Pedal inputs: sustain + 2 expression
Audio connections: stereo 1/4" jack outputs
Connections: MIDI In/Out/Thru, USB, Sync In/Out
Included software: PolyBrute Connect, Arturia MIDI Control Center
Dimensions and weight: 972x380x157mm; 22.8kg
The 3 Full Touch Modes in the PolyBrute 12 Keyboard
The PolyBrute 12's Full Touch MPE keyboard doesn't just detect pressure, it interprets the gesture along the entire key travel, opening up three profoundly different interaction modes, each designed for a specific approach to sound design and performance.
Two Phase Polyphonic Touch – FullTouch® AT
The note is activated at minimum contact, and the entire vertical key travel becomes an aftertouch area. This allows for extremely sensitive and continuous control, with an immediate response to finger movement. In practice: it enables seamless transitions from subtle timbral nuances to expansive, evolving pads by simply modulating pressure, without intervention from external controls.
Three Phase Polyphonic Touch: FullTouch® AT > Z
Retains the behavior of the previous mode, adding an additional expressive dimension: the classic aftertouch area is mapped as an assignable "Z" modulation source. The key travel is therefore divided into multiple functional phases. In practice: maximum freedom to shape the sound along both sections of the key travel, with complex and progressive modulations directly under your fingertips.
Pizzicato Envelope Touch: FullTouch® ENV > AT
In this mode, envelopes are controlled directly by the performance gesture. The speed at which the key is pressed influences the attack speed, while parameters can be independently assigned to the FullTouch® and traditional aftertouch areas. In practice: it allows for transitions from resonant, percussive plucks to slow, layered sound openings, without touching knobs or changing presets.