Andes JX
Key Features
- Two PolyBLEP anti-aliased oscillators with sine, saw, square, triangle, and PWM waveforms
- Switchable topology-preserving state-variable and nonlinear Moog-style ladder filter models
- Independent amplitude and filter ADSR envelopes plus global LFO modulation for pitch, PWM, and filter cutoff
- Mono and poly modes, glide, stereo width, key tracking, and velocity-sensitive filtering
- Up to 16 voices with 2x oversampling and 33 factory presets named after Ecuadorian Andean locations
- Open-source C++ and JUCE code with bilingual English and Spanish documentation under GNU GPL v3
Description
Andes JX is a free, open-source polyphonic subtractive synthesizer from NoiseRoom UIO in Quito, Ecuador. Its familiar two-oscillator architecture is framed through an Andean visual identity, with a slate-blue interface and 33 factory presets named after locations across the Ecuadorian Andes.
The synthesis engine uses two PolyBLEP anti-aliased oscillators with sine, saw, square, triangle, and PWM waveforms, plus noise and a continuous oscillator mix. A switchable filter section lets you choose between a topology-preserving state-variable filter and a nonlinear Moog-style ladder filter for cleaner multimode shaping or a more saturated resonant response.
Independent amplitude and filter ADSR envelopes, a global LFO, key tracking, velocity sensitivity, stereo width, glide, and mono or poly voice modes cover the essentials without turning the interface into a large modular system. The engine supports up to 16 voices and uses 2x oversampling.
Andes JX also works as an educational DSP project. The C++ and JUCE source code is documented in English and Spanish under the GNU GPL v3 license, the project was presented at AES LAC 2026 in Lima, and the current official product page provides a Windows VST3 download along with the source repository, bilingual manual, and technical documentation.
Frequently Asked Questions
What type of synthesizer is Andes JX?
Andes JX is a polyphonic subtractive software synthesizer. It combines two anti-aliased oscillators, noise, switchable SVF and Moog-style ladder filters, separate amplitude and filter envelopes, and global LFO modulation.
Which plugin format and platform are currently available?
The current official product page provides Andes JX as a VST3 plugin for Windows. The source repository discusses additional targets, but SoundShockAudio lists only the downloadable build explicitly offered on the official product page.
What is included with Andes JX?
The project includes the instrument, 33 factory presets, C++ source code, a bilingual user manual, technical documentation in English and Spanish, and a modular JUCE architecture.
Can the source code be modified or used for learning?
Yes. Andes JX is released under GNU GPL v3, and its source is structured and documented as an educational resource for studying DSP, plugin logic, preset handling, graphical interfaces, and host integration. GPLv3 conditions apply to redistributed modifications.
