It sounds like a limiter is what you need?
From: mick crane <mick.crane@gmail.com>
Sent: Monday, August 6, 2018 3:24 PM
To: Debian Users
Subject: question about sound
hello,
sorry is this is not on-topic
I'm not very good at sound.
Sometimes if I watch an mp4 film the volume in parts is low but then
there will become some sound event that is very loud.
It is true that my hearing is not as it was but I don't think that is
it.
I'm not exactly sure what controls "volume" but is there software that
will cut off the noisier bits at a level without affecting the rest.
mick
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Key ID 4BFEBB31