Behringer Proton Synthesizer

Behringer Proton — Analog Paraphonic Semi-Modular Synthesizer

The Behringer Proton is a paraphonic semi-modular analog synthesizer designed to anchor a Eurorack system or stand alone as a complete desktop voice. Two analog VCOs, dual multi-mode filters, and a deep patch bay give it the scope of a modular system without forcing the player to commit to cable-heavy patching from the first note. Connect a MIDI keyboard via DIN or USB and the instrument runs straight out of the box. Built around an intuitively linear workflow, this model pairs the immediacy of a preset-style synth with the creative reach of a semi-modular architecture. Paraphonic voicing lets two oscillators play independent pitches, opening the door to harmonized lines that a strict monosynth cannot reach.

What sets this paraphonic synth apart

The Proton ships with a multi-mode wave folder offering AM, half-wave, and full-wave folding modes plus a symmetry control — a feature uncommon at this price tier that pushes simple waveforms into dense, metallic territory. Each ASR envelope includes reverse, inverse, loop, and bounce modes, turning a standard modulation source into a tool for evolving textures.

Oscillators and sound source — the heart of the analog engine

Sound generation begins with two analog voltage-controlled oscillators, each offering five switchable waveforms plus a dedicated sub-oscillator. Oscillator sync and pulse-width modulation are available from the front panel, so the Proton covers everything from thick basses to cutting leads.

• Oscillators: 2 analog VCOs — independent pitch and waveform control per voice
• Waveforms: tone mod, pulse, sawtooth, triangle, sine — five switchable shapes per oscillator
• Sub-oscillator: one per VCO — adds weight and girth to bass patches
• Noise generator — onboard source for percussion, hats, and evolving texture layers

Filters, envelopes, and modulation — sculpting the signal

Two self-oscillating multi-mode voltage-controlled filters run in parallel and can be patched into series, giving the player both broad stereo-style timbres and aggressive single-filter drive. The envelope and LFO complement covers nearly every modulation need.

• Filters: 2 multi-mode VCFs, 12 dB/octave — highpass, bandpass, lowpass with full resonance
• ASR envelopes: 2 with reverse/inverse/loop/bounce — flexible looping modulation sources
• ADSR envelopes: 2 analog generators — classic shaping for VCF and VCA
• LFOs: 2 with 5 waveforms, MIDI clock sync — phase, depth, key, and sync controls

Connectivity, format, and physical design — Eurorack-ready integration

The Proton fits a standard Eurorack case at 80 HP and ships with a 12 VDC external PSU. Its I/O covers every common studio connection plus a deep 3.5 mm patch bay for modular expansion.

• Format: Eurorack, 80 HP — drops into any standard rack case
• MIDI: 5-pin DIN In/Out (Soft Thru) + USB MIDI — controller and DAW integration
• Main outputs: 6.3 mm jack (1/4" TS) — line-level signal to mixer or audio interface
• Headphone output: 6.3 mm TRS — private monitoring without an amp
• Patch bay: 3.5 mm I/O — extensive CV/gate routing for modular expansion
• Built-in speaker: no — headphones or external monitoring required
• Dimensions: 94 x 424 x 136 mm — desktop-friendly footprint

Who is the Behringer Proton for

The Behringer Proton is the right choice for synth players who want a true analog voice with semi-modular depth at a price that does not require a second mortgage. It suits producers building a first modular system, sound designers chasing paraphonic textures, and live performers needing a compact, MIDI-controllable analog brain on stage. Users coming from the Neutron will recognize the workflow but gain paraphonic voicing, a wave folder, and a more flexible envelope section. Anyone with an existing Eurorack rack can drop the unit in as a complete voice module.