Dynamic range compression and loudness normalization are two related but distinct processes in music and podcast mastering. They often get lumped together, but they have very different goals.

Dynamic range compression (DRC) aims to control the overall dynamic range of an audio signal. It's designed to even out loudness between quiet and loud sections, reducing the difference between the highest peaks and the lowest lows. DRC is useful for creating a more consistent listening experience and for managing loud, aggressive sound sources, but it doesn't directly affect the overall loudness of the signal.

Loudness normalization (LUFS) is a process that targets the overall loudness of an audio signal. It measures and normalizes the signal to a specific level, expressed in terms of Loudness Units relative to Full Scale (LUFS). The goal is to match the loudness of different audio pieces to a standard reference level, usually -23 LUFS for loudness normalization. This ensures that the audio level feels consistent, whether it's a podcast, a music track, or an audiobook.

When it comes to final delivery, consider this: dynamic range compression prepares the audio for mastering, while loudness normalization fine-tunes the audio to meet industry standards for delivery.