in reFX context. Possibly it refers to “ U niversal B inary dynamics ” — a weird merge of:

Refx Nexus V1.4.0 is a virtual instrument plugin developed by Refx, a renowned company in the music production industry. This plugin is designed to provide users with a vast library of high-quality sounds, effects, and features to create and produce music. Nexus V1.4.0 is compatible with Mac OS X, making it an ideal solution for producers and musicians working on Apple-based systems.

While v1.4.0 was a staple of its time, reFX Nexus 4 has completely transformed the plugin with: A fully resizable vector-based UI.

Below is an outline and summary for a technical paper regarding this historical software release.

: Even in its early stages, Nexus included a high-quality reverb licensed from ArtsAcoustic .