You can use custom sounds in Synergy. It should be easy enough to distribute them as well, thanks to the Synergy Soundscript Loader. This feature will gather all the soundscript files located in the "scripts/sounds/" directory and automatically add them to the manifest file as the game loads.
There are four directories for you to place these custom soundscript files in:
|Directory ||Description |
|scripts/sounds/levels/ ||Level soundscripts are placed in this directory |
|scripts/sounds/npcs/ ||Sounds for NPCs |
|scripts/sounds/characters/ ||Soundscripts for custom player models |
|scripts/sounds/weapons/ ||For custom weapons |