The beat the song is built on is one bar, played through bars 1-4 and 37-40 -- 33.3% of every bar the kit plays. That is the spine of it; everything else is what happens around it.
It is played on crash, hi-hat, snare and kick, counted in thirty-second notes. On its own it scores 90 out of 100 -- hard -- and the thing that decides that is how many notes a second it asks for.
The whole song is 62 out of 100, so the beat is most of what the song asks for. Get it clean and the rest follows.
The room opens this beat on its simplest reduction, at 99 BPM, and adds the notes back a rung at a time -- 5 of them. Nothing is a matter of opinion: each rung has a tempo to reach and a gate to pass before the next one.
Tempo goes 99, 119, 140, 160 and 180 BPM, and the gate at each one is 8 loops in a row with no wrong note and no wobble in the time.
PRACTISE THIS BEAT →A one-bar groove on crash, hi-hat, snare and kick, in 4/4 at 180 BPM, counted in thirty-second notes. It is written out above, and it covers 33.3% of the bars the kit plays.
Bars 1-4 and 37-40. The time is kept on the hi-hat to start with, and it changes 9 times over the song.
90 out of 100 on its own -- hard. The song as a whole is 62 out of 100, a step up from a first song, and the work is in how much of it falls off the beat.