***How Do I Do This?*** HELP

[yungfoodstamp]

i am starting out with fl studio 11 demo right now. listen to how the beat changes at 12 seconds, how do i do it? thanks

https://soundcloud.com/steven-vargas-11/mf-doom-type

 

[bandcoach]

boomboombapsst in the drums

low pass filter on the whole track, some phase distortion (most likely from the filter) also appears to have been added to all parts, could just be a very slow small-stone phaser (MXR model) type effect applied before the filter