Plex adds Boost Dialog and loudness normalization in Plex Media Server 1.43.4

On September 15, 2026, Plex shipped two Plex Pass audio options: Boost Dialog, which lifts the frequencies where voices live, and Normalize Loudness, which evens out volume swings. The loudness analysis that powers them runs on your CPU during maintenance, so measure the cost before you turn it on for a large library.