APU Software Loudness Limiter (Digital product)

Loudness Limiter for Streaming and Mastering

The APU Loudness Limiter is a plug-in that controls output loudness and catches peaks on tracks, mixes, or streams. Set limits for Momentary, Short-Term, or Integrated LUFS alongside RMS, Peak, and True Peak in one place. It runs as AAX, AU, VST, or Standalone on macOS and Windows, available by download with a perpetual license.

What Makes It Different

Unlike a traditional peak limiter, this one responds to loudness itself, not just signal level. Channels can share gain reduction or work independently, including in surround and Dolby Atmos® formats. A learn function measures output during a representative pass and applies a correction before peak limiting, so the whole chain works in one go.

Who It Is For

The APU Loudness Limiter is the right choice for mixing engineers, podcast editors, and video post-production teams who need to hit specific loudness targets. Beginners get presets for Spotify, Apple, and EBU R128 to start fast. Advanced users can dig into Threshold, Ceiling, Attack, Release, and Look-ahead for finer control over the response.