Drill takes trap's skeleton and does one thing differently: the 808 slides between notes instead of restriking, which turns the low end into the melody and leaves the rest of the beat almost empty. Everything else - the tempo, the half-time feel, the hat rolls - follows from that single decision. Play the grid, then take it apart.
Kick on the one and a syncopated push, snare landing late on step 11 rather than on the backbeat, hats running sixteenths with rolls, and an 808 playing three notes instead of one. Mute the hats and hear how bare it is - drill is mostly silence with a bassline walking through it, and that emptiness is deliberate.
They share a skeleton. These five decisions are where they separate.
This is the genre. Notes overlap and the pitch slides between them instead of retriggering, so the bass becomes a melodic line rather than a percussion hit. Glide times between 60 and 150 milliseconds cover almost everything you have heard. Building that voice from scratch is covered on the 808 design page.
Trap puts the backbeat on step 9. Drill displaces it - step 11, or a sixteenth after where you expect it. The bar feels like it is stumbling forward, which is why drill sounds tense where trap sounds heavy.
Sixteenths as the base, then rolls that subdivide into threes rather than fours. That triplet against a duple grid is the shimmer people recognise instantly. Two or three per bar; more and it turns into noise.
One melodic element, usually dark and thin - a plucked string, a bell, a detuned pad. Drill leaves space because the 808 is doing the melodic work, and filling that space is the most common way to ruin a drill beat.
Same half-time relationship as trap: the grid runs fast so hats can subdivide, but the backbeat arrives once per bar. UK drill often sits at 140–145; New York drill borrows Jersey club kick patterns and pushes higher.
Same grid, four different sets of decisions.
| Drill | Trap | Boom bap | |
|---|---|---|---|
| Tempo | 140–145 | 130–150 | 85–95 |
| Backbeat | Displaced - step 11 or later | Step 9 | Steps 5 and 13 |
| 808 behaviour | Glides between notes | Restrikes, sometimes glides | No 808 - sampled bass |
| Hat subdivision | Sixteenths plus triplet rolls | Sixteenths plus rolls | Eighths, swung |
| Density | Sparse on purpose | Sparse | Dense, layered |
| Melodic source | The 808 itself | A separate lead | A sample |
Not the drums. Drill is a bassline with percussion attached, so the melody in the low end decides everything after it. Three or four notes across two bars is plenty.
Let the second note start before the first has released. The slide is the genre - without it you have written trap with a strange snare.
The whole track hangs off this. E1 is about 41 Hz, F1 about 44, G1 about 49. An untuned sliding 808 sounds broken rather than dark.
Step 11 rather than step 9. Resist adding a second one - the discomfort of a bar that does not resolve where you expect is the point.
Sixteenths underneath, two or three triplet rolls on top. Put one just before the snare so the ear is pulled toward the displacement.
A thin, dark, single-voice line. If you are reaching for a second, the 808 is probably not carrying enough of the melody - go back and rewrite it instead.
The grid above is four voices. These have the tuning, the glide and the pattern length.
Chicago drill arrived around 2012 as a slower, heavier relative of trap. UK producers took it, raised the tempo, borrowed the sliding sub-bass from grime and dubstep, and built the sound that came back to the United States as New York drill in the late 2010s - which then added Jersey club kick patterns on top. Three regional versions, one common element: the 808 is the melody, not the drum.
Filling the space. Drill has room in it because the bassline is moving, and a producer arriving from a denser genre hears that room as something missing. Adding a pad, a counter-melody and a second percussion layer produces a beat that is busy and lifeless, because the 808 no longer has anywhere to move. If a drill beat feels empty when you solo the drums, it is probably correct.
A sliding 808 spends most of its time below 60 Hz, where phone speakers reproduce nothing. Saturation adds harmonics at 90, 135 and 180 Hz that small speakers can play, and the ear reconstructs the fundamental from them - which is why every drill record you know is distorted in the low end. Drive it until you can hear the pitch of the slide on a phone, then back off one notch. The full method is on the 808 page, and the neighbouring genre on the trap page.
Usually 140 to 145, written on a fast grid but felt at half that - the backbeat arrives once per bar. UK drill sits at the lower end; New York drill often pushes higher.
Three things: the 808 glides between notes instead of restriking, the snare is displaced later in the bar, and the arrangement is deliberately sparser. The drum skeleton is otherwise very similar.
Overlap two notes so the second begins before the first has released, and turn on glide or portamento. A glide time between 60 and 150 milliseconds covers most of what you hear on records.
Later than you expect - commonly step 11 of 16 rather than step 9. That displacement is most of what makes the bar feel tense, and moving it back to step 9 turns the pattern into trap.
You can play and rearrange the drill grid on this page with no account at all. The full Trap Machine Pro, with 808 tuning, glide and longer patterns, is part of the subscription and has a seven-day free trial.
Minor keys almost always - F minor, G minor and C# minor are common. What matters more than the specific key is that the 808 is tuned to its root, because in drill the 808 is carrying the harmony.
How a beat is actually built - the grid, the swing, the genre. Play the pattern on the page, then open the full machine.
The anatomy of a beat: kick, snare, hats, swing and arrangement, on a grid you can click.
Read it → GuideBoom bap: 88 BPM, swung hats, a snare that lands late and a bass that breathes.
Read it → Guide140 BPM half-time, 808 glides, rolls at 1/16 and 1/32 - built on the same grid.
Read it → GuideHeavy swing, a dusty filter and a kit that sits behind the beat instead of on it.
Read it → GuideMemphis cowbell, distorted 808s and a mix that is supposed to be too loud.
Read it → GuideFour to the floor, offbeat hats, and why the clap lands a hair late on purpose.
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