APU Software APU Loudness Series 3.4.3 (Win/macOS)

APU Software APU Loudness Series 3.4.3 brings four loudness and dynamics tools into one Windows installer: Loudness Meter, Loudness Compressor, Dynamics Optimizer, and Loudness Limiter. It suits home producers and mix engineers who want to inspect levels, shape dynamics, and manage loudness targets during mixing or mastering.

The Loudness Compressor offers compression and expansion based on LUFS and True Peak measurements, alongside traditional RMS and Peak modes. This gives you a choice between loudness-aware processing and conventional level detection. Dynamics Optimizer uses the same compression engine but analyzes the complete audio waveform rather than relying on real-time measurements, allowing it to refine the gain envelope across the material.

For real-time output control, Loudness Limiter can work with several measurement types at once, including a LUFS target paired with a True Peak ceiling. Loudness Meter rounds out the collection with live readings, accumulated statistics, and configurable history and histogram displays. Together, these tools cover both detailed loudness analysis and practical dynamics adjustment.