Did you delete the 'Main' folder in the '..\Divinity - Original Sin\Data\Public' folder when you deleted the mod folders? Specifically, the '..\Main\Assets\Sound' folder.
If so, for the Steam version verifying local files to restore it (in the Steam library, right click on Divinity Original Sin and select Properties, switch to the Local Files tab and then click on the 'Verify Integrity of Game Cache...' button), or the GOG version re-install.
