The GS Music Bree 6 Keyboard Synthesizer: Super cute and super fat!!!

video upload by Matt Johnson’s Keyspace

See dealers on the right as well as https://www.gsmusic.com/synth-store for availability and price.

"The Bree 6 will surprise you with its massive sound! I would take this over a vintage Juno anyday!"

Matt Johnson GS Music demos

And one from Starsky Carr:

Analog Done Right // GS Music Bree 6 Keyboard

video upload by Starsky Carr

"In this in-depth demo and review, we explore the GS MUSIC Bree 6 keyboard — a 6-voice VCO-based analog synthesizer with a fully analog signal path, built-in chorus, delay, arpeggiator, and sequencer. If you love that vintage-meets-modern sound, this one might surprise you.

From raw oscillator tones to lush stereo pads and punchy basses, I break down what makes this synth special — including its unique double/triple arpeggiator modes, MPE compatibility, and rich, characterful sound that sits somewhere between classic Roland-style synths and something entirely new.

If you’re into synths like the Roland Jupiter-8 or Roland Juno-106, this is one you’ll want to hear.

🔍 What’s Covered
Sound demo (full track made entirely on the Bree 6)
Oscillator section: saw, pulse, sub oscillator
24dB analog low-pass filter with resonance & key tracking
Dual ADSR envelopes & fast modulation
Voice modes: poly, mono, unison & stereo spread
Built-in chorus & analog-style delay
Unique arpeggiator (double & triple note modes)
Sequencer workflow & performance features
MPE support & expressive control

🎛️ This isn’t just another vintage clone. The Bree 6 blends:

Raw VCO tone with modern reliability
Hands-on workflow (minimal menu diving)
A distinct character that feels alive and immediate
A surprising amount of depth for a single-oscillator synth
🎧 Who Is This For?
Analog synth lovers
Producers looking for fat, mix-ready tones
Fans of classic Roland-style sound with modern features
Anyone wanting a hands-on, inspiring instrument"


via GS Music

The day has arrived

We’re proud to present the Bree6 Keyboard, our first synthesizer with an integrated keyboard, designed and produced in Argentina for the world. 💙

Built on a six-voice analog architecture, it delivers a powerful and expressive sound engine capable of everything from solid basses and leads to rich, evolving pads. Now expanded with a built-in sequencer and advanced arpeggiator, it becomes a complete performance and composition tool.

With its one-knob-per-function interface, semi-weighted keybed with velocity and aftertouch, and fully analog signal path, the Bree6 Keyboard is designed for immediate, hands-on control—no menu diving.
Immediate Control. No Menu Diving.

The Bree6 Keyboard version is designed to deliver an immediate and intuitive hands-on experience, eliminating the need for deep menu navigation. Its interface follows a one-knob-per-function philosophy, providing direct access to all key parameters for fast and precise sound shaping.

Expressive control is at the core of the instrument. Velocity can be assigned to modulate both the filter and amplifier response, allowing dynamic tonal variation based on playing intensity. The modulation wheel provides real-time control over LFO modulation depth, targeting the oscillator pitch and/or the filter cutoff for expressive performance.

The instrument features a semi-weighted keybed with velocity and aftertouch sensitivity, ensuring a responsive and musical playing experience. It also includes dedicated inputs for sustain and expression pedals, with the expression pedal offering configurable assignment and adjustable response range for flexible control.

In addition to its performance capabilities, the Bree6 Keyboard integrates essential connectivity options, including MIDI, USB, balanced stereo outputs, headphone output, and external control inputs, making it equally suited for both studio production and live environments.

SIGNAL PATH

The Bree6 Keyboard version features a refined signal path engineered to preserve the character and integrity of its analog sound while incorporating modern control flexibility.

The audio path is fully analog, beginning with a Voltage-Controlled Oscillator (VCO), followed by a sub oscillator and mixer stage, then passing through a 4-pole low-pass ladder Voltage-Controlled Filter (VCF), and finally into a Voltage-Controlled Amplifier (VCA).

Control signals are digitally generated and include one Low-Frequency Oscillator (LFO) and two ADSR envelope generators.

A stereo digital effects section is integrated into the architecture, combining delay and chorus, maintaining a fully analog dry signal while blending in high-quality digital processing for added depth and movement.

OSCILLATOR

The Bree6 Keyboard version features a single analog VCO per voice, complemented by a dedicated sub oscillator to enhance low-frequency content.

The oscillator provides two primary waveforms: sawtooth and pulse. The pulse waveform supports Pulse Width Modulation (PWM), which can be dynamically adjusted and modulated via the LFO to create evolving textures.

Pitch can be finely adjusted, and modulation sources can be applied to introduce vibrato and other expressive variations.

The sub oscillator generates a square wave one octave below the main oscillator, adding weight, depth, and richness to the overall sound.

FILTER

The Bree6 Keyboard version is equipped with a 4-pole ladder-type low-pass filter, designed to deliver smooth and musical frequency shaping.

The filter includes resonance control and supports multiple modulation sources, including Envelope Generator 1 (EG1) with velocity sensitivity, LFO modulation, and performance controls such as modulation wheel and aftertouch.

This flexible modulation system enables a wide range of tonal possibilities, from subtle shaping to more aggressive and resonant filtering.

CHORUS AND DELAY

The Bree6 Keyboard version includes a built-in stereo effects engine designed to enhance spatial depth while preserving the analog core of the sound.

The chorus effect creates a rich ensemble character by simulating multiple detuned voices through modulated delay lines, resulting in a wide and immersive stereo image.

The stereo delay offers adjustable timing and feedback, with a maximum delay time of up to 1 second, allowing for anything from tight rhythmic echoes to expansive ambient textures.

LFO

The Bree6 Keyboard version includes a versatile Low-Frequency Oscillator that acts as a central modulation source.

Selectable waveforms include triangle, ramp up, ramp down, square, and random (sample & hold). The LFO frequency ranges from 0.1 Hz to 100 Hz, enabling both slow evolving modulations and fast modulation effects.

It can be routed to multiple destinations, including oscillator pitch and PWM, filter cutoff, and amplifier level.

ENVELOPE GENERATORS

The Bree6 Keyboard version features two ADSR envelope generators, providing precise control over both tonal and amplitude dynamics.

EG1 is assigned to filter modulation, while EG2 controls the amplifier. Each envelope includes attack, decay, sustain, and release stages, allowing detailed shaping of the sound over time.

MIDI POLYPHONIC EXPRESSION

The Bree6 Keyboard version supports MIDI Polyphonic Expression (MPE), enabling advanced per-note control when used with compatible controllers.

This allows independent manipulation of parameters such as pitch, pressure, and timbre for each note, significantly expanding expressive capabilities and performance depth.

SPECIFICATIONS

Polyphony: 6 voices

Oscillator: Single analog VCO per voice

Filter: 24 dB/oct low-pass ladder filter with resonance

Envelope Generators: 2 × ADSR

LFO: Triangle, ramp up, ramp down, square, sample & hold

Effects: Delay, Chorus (DSP: 32-bit, 48 kHz, DAC/ADC: 24-bit)

Presets: 512

This is a new step for GS Music.
And we’re just getting started.