How to make drill 808 slides: the sliding bass guide

An 808 slide is a bass note that glides into its pitch instead of striking it, and in drill that glide is the signature of the whole genre. The pattern behind it is one shape: a root note on the downbeat, a long stretch of silence, then a quick fill at the end of the phrase where the slides live. This guide builds that shape step by step with playable examples, from choosing and tuning the 808 to anchoring the roots, writing the end fill, and turning its notes into glides. The dashed notes in the players are slides. Press Play on any example to hear them.

What is an 808 slide?

An 808 slide is a pitch glide between two bass notes: instead of the second note restarting the sample, the bass bends from the first pitch to the second in one continuous motion. On a long, sustained 808 that bend sounds rubbery and vocal, and a run of them turns a bass line into the sliding melody drill is known for.

The mechanics matter, because the note length is the speed control. FL Studio has a dedicated slide note in its piano roll: the slide note names the target pitch, and the bass glides there over the slide note’s length. A short slide note snaps to the new pitch; a long one bends there lazily. Other tools reach the same sound with a mono bass patch and portamento, or with pitch-bend automation, and the principle stays the same everywhere: short slide, fast glide; long slide, slow glide. In the players below I mark slide notes with a dashed outline, and each one glides from the previous note to its own pitch.

Which 808 sample can slide?

A sliding 808 needs length, and most weak drill basses fail at sample choice before a single note is drawn. Three things to check:

• It rings long. The glide happens inside the sample’s tail, so a short, punchy trap 808 has nothing to bend. Pick one that sustains for two seconds or more.
• It has some dirt. A bit of distortion pushes energy into the mids, which is what lets the slide stay audible on phone and laptop speakers. A pure sine sub disappears the moment the listener isn’t on headphones.
• It slides well, tested. Before committing, play the root, then the octave above, back and forth. That back-and-forth is a preview of every glide you’ll write. If the bends sound thin or clicky, swap the sample now.

Then tune it. Run the sample through a pitch detector and find its actual root; plenty of packs ship an 808 recorded in G that plays G when you press C, and every note you write afterwards is secretly wrong. Set the sample’s root so the key you press is the pitch you hear. My 808 guide covers tuning and low-end mixing in depth, and all of it applies here.

Last, tame the envelope so the note grid controls everything: the sample should sound only while the note is held, stop the moment it ends, and each new note should cut the previous one. Kill any release tail. With that set, the piano roll is the single source of truth, which is what slides need.

Where do the bass notes go?

Drill bass notes sit on the root notes of the chords. Find the bottom note of each chord in the loop, drop it low, and that’s the skeleton. The examples in this guide sit over a two-chord loop at 140 BPM, G minor for the first bar and C minor for the second, on the starting-point beat from the drill drums guide: 3-3-2 hats, displaced snare, sparse kick.

The beginner move is a root per bar, held long.

Example 1: roots only.

This is in key and it works, and it is also boring. Every drill bass you love starts from this skeleton and then does two things to it: carves out space, and decorates the end.

What shape is a drill bass line?

A drill bass phrase is one silhouette: a heavy root on beat one, a wide gap of silence through the middle, and a short fill packed into the last beats. The root is the only load-bearing note. Hold it about half a bar, then get out of the way; the middle of the phrase belongs to the kick and the hats, and the silence there is what makes the fill land.

The re-entry usually comes late. A placement I keep coming back to is one bar plus a quarter note after the top of a two-bar loop, so the bass returns just after the second bar begins and starts walking toward the turnaround. The fill itself is chord tones, root, third, fifth of the current chord, played low and quick, ending into the next downbeat.

Example 2: the drill silhouette, no slides yet.

Downbeat, space, end fill. Notice how much the empty middle does: the beat breathes, and the little run at the end pulls you back to the top. If you learn one thing from this guide, learn this silhouette.

How do you turn the fill into slides?

Make the fill notes glide instead of restrike, and put at least one big interval in the run. The octave jump is the classic drill move: hit the root, slide up an octave, slide back down. Keep the slide notes themselves short, a 16th or an eighth, so the bends stay snappy and percussive rather than seasick.

Two placement rules keep it musical:

• Roots at the start of the bar, movement at the end. The downbeat note stays a plain root and never slides. The glides live in the fill.
• Slide to chord tones first. Notes from the current chord always sound right as slide targets. Reach outside the chord only once the chord tones feel stale, and treat those passing notes as spice.

Example 3: the fill with slides. Dashed notes glide from the previous note’s pitch.

Same skeleton as example 2, but now the run bends: root, glide up an octave, glide back, then a small slide up to the fifth before the loop resets. My process for finding these is low-tech and it works: loop the beat, hum where I imagine the bass moving, then chase the hummed contour with slide notes until the piano roll matches my head.

How do you keep slides interesting over 8 bars?

Vary the fills, not the anchor. A four-bar loop usually keeps the fill at the end of bar 2 simple and saves the busier run for the end of bar 4, so the phrase has a small turnaround and a big one. Over eight bars, keep the first half as written and switch up the second half’s fills while the roots stay put.

The easiest switch-up is direction: slide down instead of up. Hit the note an octave above the root and let it fall. Give the falling slide a longer note and the glide turns slow and heavy, which reads as a completely different mood from the snappy upward bends.

Example 4: the switch-up, sliding down with a slow glide.

The four-step slide from G2 down to G1 drags, on purpose. Then the quick octave bend at the very end whips the loop back to the top. Fast up, slow down, and the same five notes stop sounding like a loop.

One mixing habit to build early: the higher a fill note sits, the more audible energy it carries, so pull the velocity of the high notes down a touch. It keeps the line consistent instead of poking out every time it jumps.

What tricks push slides further?

Four moves I reach for when a pattern needs ear candy:

• The reverse. Stack a slide note on top of a muted copy of the same note, so the bass glides into its own pitch. The swell reads like a reversed sample without touching an audio editor.
• The echo. Take the last high slide of a phrase and repeat it three or four times, dropping the velocity each repeat so it fades like a delay. Panning the repeats left and right makes it wrap around the listener’s head.
• The drop. At the end of an 8-bar section, hit the root an octave up and slide it down the full octave, slow. It works like a falling riser and announces the next section.
• The pan trade. When two quick fill notes answer each other, pan one left and one right. Small move, big width on headphones.

All of these are section-boundary tools. Sprinkled at the end of 4 or 8 bars they create structure; used every bar they turn into noise.

Where do the kicks go under a sliding 808?

Start the kick pattern by copying the 808 pattern, then thin it out. Delete the slide notes from the copy, flatten what’s left onto the kick, and you have a kick that locks to the bass by construction. Then remove hits: the kick doesn’t need to shadow every fill note, and it should stay away from the snare. My rule is that kick, snare and 808 never land on the same step together, because that pileup is where drill low end turns to mud.

Kick and 808 on the same step is fine, and on the anchor notes it’s the point. When the two fight in the low end anyway, duck the 808 under the kick in the 50 to 60 Hz range instead of turning either down; how to mix kick and bass walks that move, and how to mix a trap beat covers seating the whole low end.

What next?

A drill bass line is one shape plus one sound: root on the downbeat, silence through the middle, a chord-tone fill at the end, played on a long 808 whose fill notes glide. Anchor the roots, earn the space, then spend your creativity on the last two beats of the phrase.

Songen generates full drill loops as editable MIDI, four tracks with the dark lead, chords, syncopated drums and a sliding 808 bass, so you can start from a groove that already has the silhouette and reshape the fills with the moves here. Regenerate just the bass until a slide pattern sparks, then bend it to your taste. For the rest of the beat, the drill drums guide builds the 3-3-2 groove these slides ride, and dark chord progressions sets the harmony that gives the roots somewhere to land.