PolyRex is Safari Audio's take on the early-80s Juno-106 sound, and its third virtual instrument after Cubby and Super Chunk. Each of its eight voices runs a single oscillator with pulse-width modulation, a sub oscillator, and a noise generator into a resonant low-pass filter and a separate high-pass, shaped by a full ADSR. The defining chorus sits in a built-in Safari FX engine alongside a delay and a spring reverb.
A modulation matrix, an arpeggiator, and glide push it a little past a straight clone, which is where it earns its keep against the reference emulations. Formats are VST3, AU, and AAX on macOS, and VST3 and AAX on Windows, with a 4 GB RAM minimum.
Use TAL-U-No-LX when you want the most detailed Juno modeling and a standalone app, listed at €70 on that card. Use u-he Diva when you want analog modeling across the whole era rather than one instrument. Use Repro-5 when the part calls for a Prophet-style voice instead. The full breakdown is the PolyRex review.