Hello, how can I remove the sound that LFS plays when somebody chats on the server, Im trying to make a video and all you can hear is the hash sort of sound from people speaking.

There's a file in LFS/data/sound with that sound. I think it's called message. Just delete it or move it out of that folder and the sound should stop

You can set it in-game, press ESC -> Sound, and it should be there somewhere, if not, then look under "Misc"

Options -> Audio -> Interface volume

If you're making a video perhaps you'd like to remove the actual chat lines as well?

You can do so by changing MPR Message Block 0 to MPR Message Block 2 in cfg.txt.

Is it possible to remove the 'Xyz left the pits' messages too?

Is there any difference between MPR message block: 1 / 2?

Yes,

0 = no filter
1 = filters chat
2 = filters chat and system messages (like "x left the pits" etc.)

Quote from felplacerad :

Yes,

0 = no filter
1 = filters chat
2 = filters chat and system messages (like "x left the pits" etc.)

Nah...
That was the smart solution.
Here is mine (mechanical engineer )
Go to the data\sound folder
rename message.waw and sysmessage.waw to .old or whatever you want and enjoy the silent chatter