GS Music Bree6, a desktop 6-voice analog polyphonic Synthesizer from Argentina initially announced at KnobCon (2024) is available now.
Just over a month ago, the finished Bree6 synthesizer from the Argentinian company GS Music was spotted at Buchla and Friends 2025. It’s the sibling of the lovely GS Music e7 polysynth from Argenina.
It’s March 1st, and the Bree6 is officially out now and available for order. Better: the official feature set is also out.
GS Music Bree6 Official Features
Interestingly, GS Music has decided to release the desktop (18.11” x 7.87” x 5.51) instead of the keyboard. The latter was showcased at Knobcon 2024 but no news about an official release.
Bree6 is a 6-voice polyphonic analog Synthesizer with a fully analog signal path and a super hands-on one-knob per-function user interface without menu diving. The interface houses 27 knobs, 13 buttons, and a display that ensure a fluid workflow.
GS Music Bree6 features a single VCO per voice with sawtooth and pulse waveforms and pulse width modulation. A square wave sub-oscillator per voice adds bottom end to the main oscillator.
Then, it runs in a 4-pole ladder lowpass filter with cutoff, resonance, and keyboard tracking controls—a very classic filter structure. From here, the signal flows straight into the multi-FX processor.
You can work with an ensemble-type chorus that simulates a string or vocal ensemble using multiple delay lines modulated by their dedicated LFOs. Next to this, you have a stereo delay with a maximum delay time of up to 1 second. You can set the delay time, feedback, and delay mix.
The Bree6’s modulation is also very classic. Two ADSR envelopes can modulate the filter and amplifier (VCA) section. A multi-wave LFO with up to 100Hz can be assigned to multiple destinations: oscillator mod and OSC PWM, cutoff, and VCA.
Other modulation sources include velocity, aftertouch, and full MPE (MIDI polyphonic expression). The Bree6 has 512 memory locations for your own sounds. That is solid and should be enough.
Connectivity
On the backside, you get a power supply input, a USB port for data, a full 5-pin MIDI interface (in/out/thru), a stereo output (L/R) with mono option, and a headphone output. USB host to connect a MIDI keyboard more conveniently is unfortunately missing.
Second Impression
It’s great to see that the Bree6 is now available. I’m sticking to my first impression from 2024. I enjoy the sound quality of the synth but it is obvious that the Bree6 feature set is very minimal with a single oscillator, a lowpass filter, and classic modulations.
It’s like GS Music shows us the Argentinian answer to the Roland Juno synth but with two envelopes and a delay. For me, it’s a lovely hands-on desktop analog polysynth. However, the price of $999 is a bit difficult though, especially when you can get the Dreadbox Nymphes, from another small company, with similar features for half the price or even less.
GS Music Bree6 is available now for $899 + $100 shipping at the official store. The Bree6 is manufactured in Argentina.
Update From January 27, 2025
Knobcon 2024 is already a few months away, and there, GS Music presented the Bree6, a new polyphonic analog Synthesizer with keys and a desktop version.
There is currently no news about the Bree6, but the desktop version was spotted at the Buchla and Friends 2025 event, and it looks neat. Maybe there will be a video from the event where we get more news of it.

Article From September 11, 2024
At Knbobcon 2024, GS-Music has unveiled Bree6, a new keyboard and desktop analog polyphonic Synthesizer influenced by the e7.
Exciting synthesizers come not only from Europe or the USA but also from worldwide, including Chile, Peru, and Argentina. The latter is the homeland of the young company GS Music, which introduced the beautifully classy E7 desktop analog polysynth.
Last weekend was Knobcon 2024 (12th edition), and GS Music unveiled the Bree6, a new polysynth on their booth.
GS Music Bree6
The official details are not yet known. According to YouTuber Jorb, who published a Knobcon 2024 roundup video, it’s a new 6-voice analog polyphonic Synthesizer that will be available in keyboard and desktop versions.
Jorb says it uses many of the same ideas as the GS Music e7 desktop synth but streamlines them in a Juno-style concept. You can see that the interface is very compact but still has buttons or knobs for all functions. So a very hands-on synth.
It offers a single oscillator with saw and square waveforms plus a sub-oscillator. Then, it offers the same ladder filter as the e7 says Jorb, with cutoff, resonance, and various modulation options.
Talking about modulation. There are two ADSR envelopes and a single multi-wave LFO. Bree6 also offers a built-in chorus and delay processors and a stereo voice panning option. Arpeggiator and sequencer are also onboard.
You can also see that GS Music Bree6 has a display for visual feedback of the parameter values, a 3-octave keyboard, and pitch/mod wheels. Buttons allow you to switch presets instantly on the fly.
First Impression
At first glance, the Bree6 is an exciting new analog poly synth. I like its compactness and hands-on design. This could be an exciting synth if you are looking for bread-and-butter analog poly sounds. From the first demo, it sounds lovely. The e7 already does that and is still an insider tip.
According to Jorb, the GS Music Bree6 will be available in November. Price is TBA.
More information will follow here: GS Music
Between 1300 and 1400 for the key version and 900-1000 for the desktop version (USD)
too poor on oscs and lfos to be considered.
sell it for 600 tops.
I don’t mind, Its sound ms great
Your assumption about the price is nonsense. Clearly, you have no idea about the costs involved.
As I own and love an E7, I was initially really excited about Bree6, however the single oscillator per voice is a dealbreaker. Will have to wait for the next product, which hopefully is more full-fledged.
The synth market: Flooded with more of the same, clones and 1-man-shows producing mediocre stuff at high prices. It’s hilarious how thousands of non-musicians buy their museum pieces to never produce any music and just noodle around and burn their cash. Never realizing, that there are MIDI controllers to fulfill the need for turning knobs of softynths one 10th the price with 10x the features. Welcome to post-consumerism. No added value.
I’m glad I am not the only one who looks at things the same way. Whenever there is a new “analog” synth coming out now, I ALWAYS know I will hear VERY similar sounds, not too much terribly unique, and something pricing itself out of TODAY’s market. And yes, this new world is full of hackers that own a lot of stuff and cannot even play Twinkle Twinkle Little Star.
Imagine spending your own money in whatever tf you want without jaded broke gatekeeping nosy edgy clowns. Just imagine.
Exactly. Loopop said it in 2 or 3 of his reviews of analog synths and one of the was moog’s Muse: There is of course only so much an analog synthesizer can do. This wraps it up pretty much. If you want analog, grab a Typhon. Great sound (yes it’s mono, but do you really think 6 voices impress anyone coming from digital synths with voice counts of more than 100?), is chaep, has audio over USB and awesome filter (yes they are digital and no, nobody ever defined that analog is better for some reason I still haven’t heard). The other thing with all these synths and sadly even big manufacturers are guilty here: What’s the deal with: No Bluetooth for MIDI like any smartphone or CMEs adapters offer? And 2.0 would be nice. What’s with the shitty displays and horrible, clunky menus. Touch maybe like every 100 Euro smartphone has? What’s with the storage? I can buy SD cards for 10 bucks with 256GB, but the the drumlogue hets spacious 8…. Megabytes that us. Even the Digitakt 2 got 20 GB which is cute. It’s really interesting how synth heads are satisfied with stuff like it’s 1999, but God forbid my smartphone cam has less then 40MP for my shitty shots. Rant over 😉
There’s nothing wrong with simple synths and knob-per-function is always very welcome. Yet even simple synths need at least one feature to give it some specific identity. Sadly this machine seems to be as close to ‘generic poly’ as is possible to build. If it had a couple of weird effects like a bitcrusher and wavefolder; or if it had two or three extreme filters; perhaps LFOs that went into audio rate and tracked perfectly; or a mode where you could stack the oscillators an crossmoddulate them. But there seems to be absolutely nothing here of any particular interest.
Haters ranting on the internet are also no added value and they always sound the same. LOL
Small footprint, easy and fast to use, top sound imho with stereo option and not made in China. At least external audio input would have been nice for this price, the GS e7 has one. Dreadbox Nymphes is only mono, the more flexible and more expensive Dreadbox Artemis will be a valid contender from a boutique company.