808 Mafia is making the Trap world go crazy over a single sample from the Kill Bill movie. In the following tutorial we’ll show you how to process the FX sample to make is sound like the 808 Mafia Siren FX. You probably heard this sound everywhere but never understood its origins. The sound can be heard in a lot of records that Future put’s out (“Fuck Up Some Commas”). Even though this is an 808 Mafia signature sound, we assume using this sample in your beats will get you more listeners because they’ll think Future will jump in and give some bars.