Bix Pix Entertainment is an American animation studio best known for stop motion work, including the Amazon series Tumble Leaf, which premiered in 2014. The sound comes from the company production logo shown at the end of its programmes, a tradition borrowed from classic television where each studio signed off with a short musical ident. Clips of familiar logo stings later spread on soundboards and in fan edits, where viewers enjoy the instant nostalgia and formality they add to otherwise homemade, throwaway jokes online every day.