I think you’re confusing two different concepts, dynamic range compression and data compression.
The first is like an automated volume control that lowers the volume really really fast in a matter of ms when the volume reachest a certain threshold, (can also work the other way where in increases below a certain threshold, or both).
The reduces the file size, sacrificing quantity if a lossy codec is uses. Lossless codecs like flac are a bit to bit perfect of the original.
Meshtastic sounds great in concept but IMO it’s useless in most parts of the world due to it’s extreme low power.
If all your neighbours have one or there aren’t many buidings around blocking line of sight then meshtastic has great potential. Otherwise I would stuck be sending messages to myself.
Now, they made boards with more power that operated and crossed at several different frequency bands, specially shortwave, then meshtastic would be an incredibility powerful too. However illegal.