FREE SYNTH: ULTRAMASTER KR-106 (Roland Juno-106 and Juno-6 emulation) - No talking demo

video upload by ADL-MusicLab

"Hello, everyone!

Here's to you my 'No talking demo' of the amazing ULTRAMASTER KR-106, a FREE software emulation of the Roland Juno-106 and Juno-6 which brings back to life these iconic synthesizers!

The KR-106 is more than just another emulation — it’s carefully crafted by reverse engineering using hardware measurements, firmware analysis, and original factory schematics to deliver an authentic Juno-style experience.

The architecture, signal flow, and character closely follow the original hardware, making this one of the most faithful Roland Juno-106 and Juno-6 recreations currently available in software form.

More info here:
https://kayrock.org/kr106/

GitHub page:
https://github.com/kayrockscreenprint...

In this demo I will just let you hear what the developers have made for this stunning plugin simply by scrolling and playing some of its 128 beautiful presets.

Some specs:
1984 Mode: all parameters calibrated from firmware analysis and factory schematics;
1982 Mode: analog CV path modeled from circuit analysis and hardware measurements;
6-Voice Poly: per-voice DCO, VCF, VCA, and ADSR envelope. Shared LFO, HPF, chorus, and arpeggiator. Mono, Poly I, and Poly II key modes with portamento;
128 Factory Presets: all original patches decoded from factory SYSEX data, no hand tweaking;
IR3109 VCF: 4-pole TPT OTA cascade with expo converter saturation and resonance self-oscillation .2x oversampled;
MN3009 BBD Chorus: bucket-brigade delay modeled with Hermite interpolation, charge-well saturation, and modulated bandwidth filter;
Analog Variance: per-voice component tolerances model the subtle differences in pitch, envelope timing, VCA gain, and pulse width that give analog polysynths their character;
Free & open source;
Available as AU, VST3, CLAP, LV2, and standalone;
And much more...

#roland #synth #juno106"

ULTRAMASTER KR-106 Open Source Roland Juno-106 Soft Synth Emulation

"A virtual analog synthesizer inspired by the classic Roland Juno polysynths, with DSP calibrated from hardware measurements, firmware analysis, and factory schematics. 6-voice polyphonic.
Free and open source. AU, VST3, CLAP, LV2, and standalone."

Additional details via Reddit:

"We started building a Juno software synth in a Brooklyn loft in 2000. 25 years later, we're releasing it as open source. Meet the Ultramaster KR-106.

Back in 2000, my buddy Dave and I started Ultramaster Group with a wild idea: professional audio software for Linux. We were young, broke, working in a loft in Brooklyn, and perhaps a little bit ahead of our time.

Life happened. I went on to start a screen printing studio. Dave ended up at Google. But we never really stopped thinking about the synth.

Fast forward 25 years. Hardware is exponentially faster, DSP methodology has evolved, and we now have access to oscilloscopes, service manuals, and communities like this one. So we went back to the source code and overhauled everything.

The KR-106 is a 6-voice polyphonic Juno-106 emulation with:

Per-voice DCO, VCF (TPT cascade, IR3109 OTA-C design with 2x oversampling), VCA, and ADSR
Sub-oscillator (CD4013 flip-flop model) and noise source (2SC945 avalanche model)
PWM modes (manual / LFO / envelope)
4-position HPF (bass boost / flat / 240 Hz / 720 Hz)
Per-voice component variance modeling analog tolerances (pitch ±3¢, envelope ±8%, VCA ±0.5 dB, pulse width)
BBD chorus emulation (MN3009 modeled with Hermite interpolation)
Arpeggiator, portamento, Mono/Poly I/Poly II key modes
Two calibration modes: '1984 Mode' (firmware + schematics) and '1982 Mode' (circuit analysis + hardware measurements from my own Juno-6)
128 factory presets decoded from original SYSEX data
AU/VST3 on Mac, VST3/LV2 on Linux, VST3 on Windows, plus Standalone
It's 100% free, GPL-licensed, and we don't take donations. We just want it to be as accurate as possible, and we'd love help getting there.

Website: https://kayrock.org/kr106/"