You can now choose to play sound when the container view GUI opens.
Updated portion of the config:
English:
Code (YAML):
settings: # Play sound when view GUI opens. # You can find all the sounds here: https://hub.spigotmc.org/javadocs/spigot/org/bukkit/Sound.html sound-effect: # Play or not, default enabled. enable: true
sound: BLOCK_BARREL_OPEN