(Revised and resent because the original message to LAU was rejected.)
Dynamic Range Destroyer (DRD.lv2 or simply DRD) is an audio compressor plugin
that aims to remove changes in volume from an audio stream. This effect is
also called auto volume levelling, volume normalization, or "stable volume."
It supports mono, stereo, 6-channel, and 8-channel streams, and it preserves
the balance among channels.
DRD is not a peak limiter, and it does not drop the volume to avoid or
prevent clipping. Its behavior is intentionally similar to that of the
compand filter of FFmpeg.
https://github.com/DaveFlater/DRD
To install as a global system audio filter for Linux with PipeWire, see
https://flaterco.com/kb/audio/pipewire/volume.html