You'll want to make sure that the volume is turned up.
Here is an example of what you don't want to hear.
This is the sound you do want to hear. Not "sort of" or "kind of" or even "pretty close", this is the only sound that will emanate from barrels with sound (pun intended) rib joints.
For comparison, here is a video with both barrels, hung side-by-side (ha! I kill me).