NUGEN Audio
NUGEN Audio - AB Assist 2
NUGEN Audio - AB Assist 2
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AB Assist 2 is NUGEN Audio's comparison tool: a quick, honest way to switch between up to four pieces of audio, whether that's takes, mix revisions, versions of a master or two plugins doing the same job. Its blind test mode labels the sources randomly, so you choose with your ears rather than your expectations.

Fair comparisons
Louder nearly always sounds better, which makes most A/B tests meaningless. AB Assist 2 can match the short-term loudness (LUFS) of each source automatically, so you're judging tone and balance, not level. There's a mono check for hearing the fold-down, smooth fades between sources so the switch itself doesn't colour your judgement, and multiple instances talk to each other directly without needing an external send.
Where it fits
Choosing between mixes or masters, shoot-outs between plugins, and settling arguments with clients or bandmates. It also works on surround mixes in any channel count. A small tool that makes better decisions much easier.
Features
- Compare up to four audio sources
- Blind test mode with random labelling
- Auto level matching by short-term loudness (LUFS)
- Mono fold-down check
- Smooth fades between sources
- Stereo and surround in any channel count
- Instances communicate directly, no external send needed
System requirements
- Mac: macOS 10.13 (Intel) or macOS 11 (Apple Silicon) or later
- Windows: Windows 10 or later
- AAX, VST3 and AU (Mac only)
SOUND7 is an authorised NUGEN Audio reseller.
Digital delivery: licence activation code sent by email.
