Increase volume only of of low-volume parts of the audio, while keeping high-volume parts as-is

[Trebor]

@mnalis

think presentation recording, where only presenter has a mic, and questions from audience are picked up by it, but at much lower volume,

LevelSpeech2.ny plugin worth a try: it’s a compressor-limiter combo.
It’s an Audacity-specific plugin, so should work for Linux users.