Originally Posted by gigawuts
The chirping I'm thinking of is most definitely not the rare weapon drop.
Not a rare ITEM, but a rare CONTAINER. The breakable item boxes with a red stripe.
The chime that plays when a rare ITEM drops is clearly different than the mystery "ping" which people seem to be so confused about, which is also clearly different than the pings for the event tablets and matter board item drops.
I'm pretty sure that the ping is for the red-striped, rare containers. They typically have things like rarer discs, 4-star equipment and higher and things like that.
... yeah, as was stated earlier, I've killed many more rappies than pings I've heard. I'm pretty sure that it's either a room reset or red container spawn (which would make sense, seeing as how there is
a weekly ranking for the number of red containers busted open).