I was in 1.12.2, again only had that downloaded and a visual mod that changes no sounds, so if SpaceFace545 is in the same boat I'm in, it doesn't have to do with conflict. What I'm wondering is, if everything is bundled in the download, or if there is some kind of missing dependency.
EDIT: Got it to work! you dont download directly from the download link. Instead you need to go to the source code and download it from there. The direct download link contains the mod, but does not have any of the sounds that the program uses, hence why there are no sounds with a completely stock game.