The sound is the sonic logo Netflix plays before its original series and films, widely known by the onomatopoeic name ta-dum, later stylised as Tudum. Introduced in 2015 alongside the expansion of Netflix Originals, it was designed to be heard in living rooms and on phones as a short cue that viewing was about to begin. Like the Windows XP startup sound, it became instantly recognisable outside its platform, spreading through YouTube and TikTok as a standalone meme for turning ordinary footage into a streaming premiere.