AB Assist 2

AB Assist 2 by NUGEN Audio is a utility plugin that makes critical listening faster and more objective. It lets you instantly switch between up to four audio sources—different takes, mix revisions, master versions, or plugin settings—with smooth fades and no clicks. The blind test mode randomizes channel labels to eliminate bias, while auto-level-matching compares sources at equal short-term loudness (LUFS). A mono-check button lets you audition mono fold-down, and multiple instances communicate directly without external sends. Version 2 adds support for surround mixes in any channel count. Whether you’re A/B-ing compressors, comparing vocal comps, or checking a master against a reference, AB Assist 2 keeps your ears honest and your workflow quick. It suits mixing and mastering engineers, producers, and anyone who needs reliable, unbiased comparisons in FL Studio, Ableton Live, Logic Pro, or any major DAW.