JSFX Retro Limiter
https://stash.reaper.fm/46952/Retro%20limiter
RMS feedback limiter, with a smooth clip in between the gain reduction and feedback detector stage.
Followed by a brickwall limiter to catch some stray peaks.
Controls...
Threshold: controls the distance below clipping that feedback limiter kicks in, values closer to 0dB produce more distortion.
Release: controls the release time.
Gain: Pushes more level into the limiter
Mode: Normal, gain raises output level; Attenuate, gain lowers the threshold;
Max output is -0.5dB