The Roland JD-990 never had the cultural cachet of a TB-303 or a Juno-60. It was a workhorse: a 1993 rackmount version of the JD-800, built for studios that wanted that synth's lush, layered PCM sound without the giant slider-covered keyboard on top. Now The Usual Suspects, the reverse-engineering collective that's spent the past few years turning DSP chips from dead hardware into working plugins, has quietly put a JD-990 simulator called JADE into the hands of its Discord supporters.
What does JADE actually reproduce?
This isn't a rough approximation built from ear and guesswork. The team's method, as with their earlier Access Virus (Osirus) and Waldorf microQ (Vavra) simulators, is low-level analysis of the original chips: the JD-990's envelope, TVF and CSP sections are modeled closely enough that the developers describe the output as sonically identical to hardware. JADE carries over the JD-990's full architecture: four tones per patch pulling from 195 PCM waveforms (nearly double the JD-800's set), oscillator sync, ring modulation and frequency cross-modulation, a multimode filter switchable between lowpass, bandpass and highpass, two multi-wave LFOs per patch, and the onboard multi-FX processor with chorus, phaser, distortion, delay and reverb. It's 24-voice polyphonic, multi-timbral, and it reads original JD-990 sound banks, so patches made on real hardware in 1993 load straight in.
It ships as AU, VST2, VST3, LV2 and CLAP, covering macOS (Intel and Apple Silicon), Windows and Linux in one release, a wider net than most boutique emulation projects bother casting.
Why can't everyone download it yet?
Because of how the group builds these things. A JADE session won't make a sound without the actual Roland ROM file loaded into it, the same wavetable data that lived inside the real JD-990's chips. The Usual Suspects doesn't ship that ROM, and it doesn't pretend to: the plugin is explicitly built for people who already own a JD-990, or who have otherwise legally acquired the ROM. That keeps the project on the right side of a line a lot of unofficial emulation projects blur.
Right now JADE is limited to a public alpha for supporters in the group's Discord, ahead of a full release through their own site. It's the same rollout pattern they used in December 2025 for JE-8086, their emulator of Roland's JP-8080, before that project reached a wider audience.
The JD-990 earns the 'Super JD' name as an enhanced rackmount version of the JD-800, adding nearly double the PCM waveforms and a built-in multi-FX processor.
Who is this actually for?
Realistically: people who already own a JD-990 or its ROM and want it running inside a DAW instead of racked up next to an audio interface, plus synth historians curious what a meticulously reverse-engineered 90s Roland workstation sounds like without hunting eBay for a unit that's now over thirty years old. The Usual Suspects' catalogue, which also covers the Access Virus, Virus TI, Waldorf microQ and MW II/XT, and Nord Lead 2X, has quietly become one of the more serious preservation efforts in synth emulation, and JADE is its most ambitious target yet.
