Andes JX: Free Polyphonic Subtractive Synth by NoiseRoom UIO
Andes JX is a free, open-source polyphonic subtractive synthesizer from Ecuadorian developer NoiseRoom UIO. Created by Jhonatan López, it doubles as a musical instrument and an educational platform for audio DSP and plugin development. The plugin is available for immediate download from the developer's website with no sign-up required.
Features and Sound Design
Andes JX ships with two oscillator models built on PolyBLEP and DPW techniques for alias-free waveforms. Each voice runs through a state-variable filter and a nonlinear Moog-style ladder filter, both with per-voice control. Modulation includes ADSR envelopes, LFOs, and a modulation matrix assignable to pitch, filter cutoff, and amplitude. Performance controls cover velocity, aftertouch, and MPE-ready expression.
The 33 factory presets draw inspiration from locations across the Ecuadorian Andes — volcanoes, high-altitude lakes, and cloud forests — giving the bank a distinct regional character while covering basses, leads, pads, and plucks.
Formats and Compatibility
The synth is distributed as VST3 and CLAP for Linux, macOS (Intel and Apple Silicon), and Windows. Source code is hosted on GitHub under a permissive license, making it a practical study reference for developers learning JUCE and modern plugin architecture.
Quick Facts
Andes JX is completely free and open-source with no registration, no time limit, and royalty-free usage for commercial projects. Download the installer or source directly from the developer's site.
FAQ
Is Andes JX really free with no strings attached? Yes, it is free to download and use commercially with no sign-up, no trial period, and no hidden costs.
What plugin formats does Andes JX support? VST3 and CLAP on Windows, macOS (Intel and Apple Silicon), and Linux.
Can I modify the source code for my own projects? Yes, the full source is available on GitHub under a permissive open-source license.