MNTRA Instruments has released FLTRS-LE, a free filter plugin built around the company’s “Europa-6” circuit — a component-level recreation of the Roland Jupiter-6 filter. It’s carved out of the paid FLTRS bundle (which ships 37 legendary analog circuits and an experimental physics engine) and unlocks the Europa-6 model in full so you can use one of the most musical analog filters in synth history without paying anything.
What is FLTRS-LE?
Rather than relying on tone matching or static EQ curves, MNTRA Instruments has rebuilt the Jupiter-6 filter at the circuit level: OTA gain stages, the SVF topology, component tolerances and the small non-linearities that give the original its character are all part of the model. On top of the faithful recreation, FLTRS-LE pushes the design beyond hardware limits with negative resonance, a parallel band-split path and a vintage aging-drift mode that simulates how the circuit behaves over years of use, giving you both authentic and clearly-out-of-spec sounds.
Key Features
- Europa-6 circuit — a component-level recreation of the Roland Jupiter-6 filter, fully unlocked
- Component-modeled rather than tone-matched: OTAs, SVF topology, tolerances and non-linearities
- Negative resonance that exceeds what the original hardware could do
- Parallel band-split signal path
- Vintage aging-drift simulation
- Nine atelier presets bundled
- VST3 / AU / AAX, Mac and Windows, instant download
How to Install & Activate
Create an account on the MNTRA Instruments website, add FLTRS-LE to the cart and check out at $0. The download link is sent by email — install it, then log in inside the plugin with the same email and password to activate.
Final Thoughts
Free filter plugins are common, but circuit-level Jupiter-6 emulations are not — and getting the negative-resonance and aging-drift extensions on top makes FLTRS-LE useful both as a vintage tone color and a sound-design tool. If you find yourself reaching for it often, the full FLTRS bundle adds 36 more circuits worth exploring; for now it’s an easy one to grab on the free tier.