It stopped a good while ago but I still couldn't find it. I assume that it was a tiny Bluetooth speaker that was stashed somewhere by one of my friends.
Though at one point the kazoo stopped and was replaced by the Boku No Pico theme but it was the slowed-down meme version.
Still, I'm amazed you couldn't pinpoint its location. I wonder if there's more than one speaker, or something. '-' X
How'd someone manage that?
X