It looks like it’s doable. The Sound Cue is called “PW_gen_machine_fabrication_CUE.” You could either set it to not be repeatable, remove the sound, replace the sound, lower the volume on the wav file or adjust it in the “Volume Multiplier” under the Cue file. I don’t know if you would replace the actual Fabricator in your mod, or use the “Additional Engrams” and create a brand new fabricator called. “Silent Fabricator”. The SoundCue is linked to the /Structures/MachinesWorkbench/FabricatorEmitter.