GS Music Bree6 Keyboard Adds Aftertouch to Analog Polysynth

TL;DR: GS Music has finally released the keyboard version of its Bree6 analog polysynth, adding a three-octave keybed with aftertouch to the lush desktop module. Available now for $1699, it completes the original vision for this six-voice instrument from Argentina.

• The Bree6 Keyboard adds a 3-octave velocity & aftertouch keybed, pitch/mod wheels, and pedal inputs to the existing six-voice analog synth engine.
• It retains the core analog signal path: a single VCO per voice with simultaneous saw/square waves, a 4-pole ladder filter, and ensemble/delay effects.
• Priced at $1699, it’s available directly from GS Music in blue or black finishes, announced just ahead of Superbooth 2026.
• The keyboard does not support MPE, despite the synth engine having MPE capabilities.
• This release fulfills the 2024 promise of both keyboard and desktop versions, with the desktop module having launched first.

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The Keys Arrive

We at Noxal have a soft spot for promises kept in an industry often fueled by vaporware and delayed shipping estimates. Back in 2024, when the GS Music Bree6 was first teased, the boutique Argentinian outfit was clear: there would be a keyboard version and a desktop module. In a move that felt like a gentle nod to practicality (or perhaps just the realities of small-batch manufacturing), the desktop module shipped first, leaving keyboardists in a state of anticipatory GAS. Today, ahead of Superbooth 2026, that tension is resolved. The Bree6 Keyboard is officially here.

The company’s announcement carries the proud tone of a milestone reached: “With great dedication and commitment, it is an honor for us at GS Music to present the Bree6 Keyboard version, our first synthesizer with an integrated keyboard.” This isn’t just another product drop; it’s a rite of passage for the manufacturer. For us, it’s the completion of a circuit. The synth we first wrote about as a compelling spec sheet and a prototype at Knobcon is now a fully-realized, playable instrument. The wait, it seems, was for a purpose.

What’s in the Box

So, what exactly does $1699 get you? The headline act is the newly integrated three-octave keyboard, which brings velocity and channel aftertouch to the party. This is flanked by the expected pitch and mod wheels, along with octave up/down buttons—essential tools for navigating the polyphonic landscape without constantly reaching for a transpose switch. GS Music has also thoughtfully included inputs for sustain and expression pedals, with the latter offering configurable assignment and response range, a nice touch for live performance nuance.

There is, however, a notable asterisk. While the Bree6’s synth engine itself supports MPE, this keyboard does not. It’s a curious, almost philosophical split. The instrument is MPE-capable if you drive it from an external controller like a LinnStrument or Seaboard, but its own keys speak the traditional MIDI language. For some, this will be a non-issue; for the growing cohort of MPE acolytes, it might feel like a missed opportunity for deeper integration. Otherwise, the core synth—the analog voice architecture, effects, and that gorgeous interface—is identical to the beloved desktop module, now dressed in your choice of blue or black.

The Analog Heart

Let’s not forget what made the Bree6 interesting in the first place. At its core, this is a six-voice analog polysynth with a refreshingly straightforward, almost “back-to-basics” signal path. Each voice is built around a single voltage-controlled oscillator that delivers simultaneous sawtooth and square waves—a architecture that will feel warmly familiar to fans of classic Roland Junos. This feeds into a 4-pole ladder filter, which YouTuber Jorb (who featured it prominently at Knobcon 2024) suspects is the same lush filter found in GS Music’s flagship E7.

The rest of the package is thoughtfully appointed: two ADSR envelopes, a versatile single LFO, an arpeggiator, a sequencer, and stereo voice panning for a wide, immersive soundstage. The onboard effects—a lush ensemble chorus and a delay—are not mere afterthoughts but integral parts of the instrument’s character. And true to GS Music’s design philosophy, visual feedback is key, with LED indicators showing voice allocation and a central LCD screen for deeper parameter diving. It’s a synth that feels both immediate and explorable.

Context and Competition

Priced at $1699, the Bree6 Keyboard enters a crowded mid-tier polyphonic arena. It sits in the neighborhood of instruments like the Sequential Take 5 or the ASM Hydrasynth Explorer (with keys), though its purely analog, six-voice ethos carves out a distinct niche. Its greatest differentiator, however, might be its provenance. We at Noxal are consistently thrilled to see compelling hardware emerge from beyond the traditional synth hubs of the US, Europe, and Japan. GS Music’s Argentinian roots bring a unique perspective to design and, potentially, to sonic character.

Who is this for? It’s for the player who craves the immediacy and warmth of analog polyphony but desires a more compact, focused instrument than a vintage behemoth or a modern flagship. It’s for the studio musician who admired the desktop module but whose workflow is irrevocably tied to a keyboard. And it’s for the enthusiast who values supporting smaller, passionate manufacturers. The Bree6 Keyboard isn’t trying to be everything to everyone; it’s a confident, well-executed statement of what GS Music believes a modern, playable analog poly should be. Now, if you’ll excuse me, I need to check my bank account and then brew a very strong coffee to contemplate my life choices.

Now, if you’ll excuse me, I need to check my bank account and then brew a very strong coffee to contemplate my life choices.