Slight rattle sound on left-hand pinky buttons

[Ubizmo]

I've had my Rochelle 2 Anglo 30b for under a month. I've recently noticed a slight "rattling" sound when I play the left-hand lowest pinky notes. It might have been there from Day One, because I haven't really been using those buttons. It's very slight and transient, and only happens when I start to push or draw the bellows, not when I push the buttons themselves. Any idea what that could be?

 

The instrument is under factory warranty. I could, and probably will, take it back to Liberty Bellows to have them look at it. But I thought I'd ask here first.

[Chris Ghent]

If it is a buzzy rattle that happens on the low notes when you transfer from push to pull without lifting the button, learn to live with it. It can be avoided mostly if you lift the button and put it back down between push and pull. 

[Ubizmo]

47 minutes ago, Chris Ghent said:

If it is a buzzy rattle that happens on the low notes when you transfer from push to pull without lifting the button, learn to live with it. It can be avoided mostly if you lift the button and put it back down between push and pull. 

Yes, that pretty much describes it. It occurs either when starting to push or pull or when changing direction with the button down. It's not loud, and it's very brief. It's only on low notes. I wouldn't describe it as "buzzy" because that almost implies that it lasts longer than it does, but since you did use the word, it sounds like the "attack" sound of a kazoo when you start to sing a very low note into it: just a fleeting crackle.

[Chris Ghent]

Thats it…