Describe the solution you'd like
A client config option (like the existing forbidden sounds) or an option inside ESM itself to set the mute volume for an entire mod. Machines in a lot of mods are too loud compared to everything else and adding every machine and setting a volume gets tedious. Something like '*:mekanism' or 'mekanism' followed by a number between 0 and 1 to scale the volume.

Describe alternatives you've considered
Change the ESM data format from .dat to .json (or similar) so it's easy to add sounds manually in a list. The above solution wouldn't need this since the client config is already text editable After writing this I've realized the .dat files are actually json files

I have plans to change the GUI of the mod, and having a way to muffle an entire mod was part of it, still don't know if it will be part of the gui or just a config option but it will come