GS Music Bree6 Keyboard – 6-Voice Analog Polyphonic Synthesizer with Integrated Keybed (Blue)

OVERVIEW

With great dedication and commitment, GS Music proudly present the Bree6 Keyboard version, their first synthesizer with 37 integrated keys, designed and produced in Argentina for the world. This instrument represents a significant milestone in our journey as instrument makers and reflects our vision to create tools for musicians who value quality as a non-negotiable standard.

The Bree6 Keyboard is built to deliver an intuitive and expressive analog experience, combining a robust architecture with a carefully crafted user interface that invites exploration and creativity. Built upon a six-voice analog architecture, the Bree6 Keyboard delivers a powerful and expressive sound engine, capable of producing a wide range of textures, from solid basses and articulate leads to rich, evolving pads. Its carefully designed signal path, combined with an intuitive interface and a high-quality keyboard with velocity and aftertouch sensitivity, provides a direct and immersive playing experience.

Expanding beyond the desktop version, the Bree6 Keyboard incorporates an advanced arpeggiator and a built-in sequencer, significantly enhancing its creative capabilities. The arpeggiator features multiple layers of operation, allowing for complex rhythmic patterns and evolving sequences, while the sequencer enables users to capture and develop musical ideas directly from the instrument, making the Bree6 Keyboard a complete performance and composition tool.

Every aspect of the instrument has been developed with careful attention to detail, combining a refined aesthetic with a robust and purposeful construction. The Bree6 Keyboard features an all-metal build complemented by natural cedar wood side panels and is hand-assembled to ensure quality and consistency in every unit.

It incorporates a semi-weighted keybed with velocity and aftertouch sensitivity, along with pitch bend and modulation wheels engineered in-house to provide precise, reliable, and expressive control.

KEY HIGHLIGHTS

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 signal path in the Bree6 is entirely analog, including a single VCO per voice, a sub oscillator, a mixer, a 4-pole low-pass ladder VCF, and a VCA. The control voltages are digitally generated, comprising one LFO and two ADSR-type envelope generators. It also features a stereo digital effects processor with Delay and Chorus.

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’s filter is a 4-pole ladder-type low-pass filter with resonance control. It can be modulated by EG1, with velocity affecting the modulation depth, and can also be modulated by the LFO. It can also be controlled by the modulation wheel and aftertouch.

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.

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.

FEATURES

• Six-voice analog polyphonic synthesizer with integrated 37-key keyboard
• Semi-weighted keybed with velocity and aftertouch sensitivity for expressive performance
• One-knob-per-function interface for immediate hands-on sound design without menu diving
• Fully analog signal path featuring a dedicated VCO, sub oscillator, mixer, ladder filter, and VCA for each voice
• Advanced arpeggiator capable of generating complex rhythmic patterns and evolving sequences
• Built-in sequencer for capturing, developing, and performing musical ideas directly from the instrument
• Dedicated pitch bend and modulation wheels designed in-house for precise real-time control
• Velocity routing for dynamic control of filter and amplifier response
• Modulation wheel assignment for oscillator pitch and filter modulation depth
• Expression pedal input with configurable parameter assignments and adjustable response range
• Sustain pedal input for enhanced performance flexibility
• Analog oscillator architecture with sawtooth and pulse waveforms
• Pulse Width Modulation (PWM) with LFO modulation capabilities for evolving timbres
• Dedicated sub oscillator adds weight, depth, and low-frequency richness
• Classic ladder-style low-pass filter with resonance control
• Filter modulation via envelope generator, velocity, LFO, modulation wheel, and aftertouch
• Stereo chorus effect for wider, richer ensemble-style sounds
• Stereo delay effect with adjustable timing and feedback for rhythmic echoes and ambient textures
• Flexible LFO with multiple waveform options for modulation of pitch, PWM, filter, and amplifier parameters
• Dual ADSR envelope generators for detailed control of tonal and amplitude shaping
• MIDI Polyphonic Expression (MPE) compatibility for advanced per-note performance control
• Comprehensive connectivity including MIDI, USB, balanced stereo outputs, headphone output, and external control inputs
• Robust all-metal chassis construction with natural cedar wood side panels
• Hand-assembled for quality, consistency, and reliability
• Suitable for studio production, live performance, sound design, and composition workflows
• Designed and manufactured in Argentina

TECHNICAL SPECS

Product Type: Polyphonic Synthesizer with Integrated Keyboard

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

Colour/Finish: Blue

DOWNLOADS

• User Manual