I cant get my warthunder sound mods to work

my sound mods arent working im using the RCSM mod but i am not noticing a change in sound after i do the correct steps can some please help:(

do you follow all stage to activate sound mod?
You have a ligne to modify in the main game folder.

how do you do that?

Try this.

My war thunde rlauncher doesnt have the option to enable modded sound. I did everything correct and followed the steps, what do I need to do to be able to enable the RSCM mod sound?