One machine, four decades

The TR-808 sold poorly, was discontinued in 1983, and then spent forty years becoming the most influential drum machine ever built — not by being realistic, but by being itself in four different genres' hands. This recipe visits four of those hands: the 1982 electro of "Planet Rock," the same year's slow soul of "Sexual Healing," the tuned-kick boom of Miami bass, and the half-time rolls of trap. Same eight circuits every time; what changes is the pattern, the accents, and which knob someone dared to turn all the way up.

One honesty note before the first grid: these patterns are starting points, not transcriptions. Where a record's production story is documented, the recipe says so; the grids themselves are the versions ears agree get you into the neighborhood, and your ears finish the trip. The voice knobs, on the other hand, are exact — every attribute below is spelled as the shipping object spells it, and the calibration numbers behind the voices live in the drum machine chapter and the tr808_calibration.ipynb notebook.

The scaffold every recipe shares

One phasor~ is the transport; every tap.808.seq~ row reads it; every row's output cable is a voice's trigger input. The phasor's frequency for a 16-step bar of 4/4 is BPM ÷ 240 (four beats per cycle, four sixteenths per beat). Rows fed the same ramp are sample-locked forever — that is the sequencer's phase-derived design (see its machine chapter), and it is why nothing below mentions sync.

phasor~ (BPM/240)
   ├── tap.808.seq~  ──▶ tap.808.kick~   ──┐
   ├── tap.808.seq~  ──▶ tap.808.snare~  ──┤
   ├── tap.808.seq~  ──▶ tap.808.hat~    ──┼──▶ +~ ──▶ tap.limi~
   ├── tap.808.seq~  ──▶ (open) hat inlet 2┤
   └── tap.808.seq~  ──▶ tap.808.cowbell~──┘

Program a row with two lists: hits (which of the 16 steps sound, 1/0 per step) and accents (which sounding steps lean, 1/0 per step). An accented step emits the row's accented level (default 0.5), a plain step emits plain (default 0.01) — those defaults are the hardware's accent knob at noon, and they matter more than they look, because a voice's trigger amplitude is a voltage on the 4–14 V bus: an accented hit is punchier and differently voiced, not merely louder. Raise accented toward 1.0 when a groove should hit like the accent knob cranked. Single steps tweak with step <n> <velocity> (1-based), and each row's 16 slots (store/recall) hold your fills.

In the grids below, X is an accented hit, x a plain one, . a rest.

1982, the Bronx via Düsseldorf: the "Planet Rock" kit

The documented part: Afrika Bambaataa and producer Arthur Baker built "Planet Rock" on a rented TR-808, borrowing Kraftwerk's melodies, and its kit — dry kick, clap-snare backbeat, offbeat cowbell — became the electro sound. The orchestra stabs were a sampler's; everything percussive is the machine's.

step:    1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
kick:    X . . . . . . x . .  x  .  .  .  .  .
snare:   . . . . X . . . . .  .  .  X  .  .  .
clap:    . . . . X . . . . .  .  .  X  .  .  .
closed:  x . x . x . x . x .  x  .  x  .  x  .
open:    . . . . . . . . . .  .  .  .  .  x  .
cowbell: . . x . . . x . . .  x  .  .  .  x  .
  • Tempo ≈ 129 BPM → phasor~ 0.5375.
  • tap.808.kick~: @decay 0.35 @tone 0.55 — the electro kick is short and clicky, not the boom (that comes later in this chapter).
  • tap.808.snare~: @tone 0.6 @snappy 0.7; layer tap.808.clap~ on the same backbeat row — the clap-plus-snare composite is half the sound.
  • tap.808.cowbell~ on the offbeats, @level 0.6. The drum machine chapter's line stands: more cowbell is a patching decision.
  • Hats: closed 8ths; the open hat answering just before the bar turns.
  • Fill: store 1 the main pattern, program the classic descending-tom fill (tap.808.tom~, @size high → mid → low on three rows) into slot 2, and recall 2 a bar before the phrase ends — quantize cycle (the default) swaps it exactly on the downbeat.

1982, Ostend: the "Sexual Healing" slow jam

The documented part: Marvin Gaye programmed the TR-808 himself for "Sexual Healing," and it became one of the first major hits carried by the machine — proof in the same year as "Planet Rock" that the same circuits could whisper. The kit is soft, sparse, and riding the plain/accent distinction rather than density.

step:    1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
kick:    X . . . . . . x . .  .  .  .  .  .  .
snare:   . . . . x . . . . .  .  .  x  .  .  .
closed:  x . x . x . x . x .  x  .  x  .  x  .
open:    . . . . . . x . . .  .  .  .  .  x  .
claves:  . . x . . . . . . .  x  .  .  .  .  .
  • Tempo ≈ 94 BPM → phasor~ 0.3917.
  • tap.808.rim~ @model claves — the high tick is the hook of the kit. @level 0.5 keeps it a seasoning.
  • tap.808.kick~: @decay 0.6 @tone 0.35 — rounder than electro, still polite.
  • tap.808.snare~: @snappy 0.35 @tone 0.4 — more drum, less noise.
  • Leave the sequencer's plain level at its 0.01 default and place accents sparingly; at this tempo the difference between a 4 V hit and a half-accented one is the entire feel.
  • A touch of @swing 0.15 on the hat row loosens the grid the way a human thumb on the start button did.

Late eighties, Miami: the kick is the bassline

Miami bass turned the kick's decay knob to the top and discovered the 808's bass drum is a tuned instrument — a bridged-T resonator whose fundamental sits near 49 Hz (measured within 2.4 % of a real unit across the knob grid; see the calibration pass in the drum machine chapter). Turn decay up and it rings for seconds; give two copies two tuning ratios and you have a two-note bassline.

step:            1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
kick A (root):   X . . . . . . . . .  X  .  .  .  .  .
kick B (fourth): . . . . . . X . . .  .  .  .  X  .  .
snare:           . . . . X . . . . .  .  .  X  .  .  .
closed:          x . x x x . x x x .  x  x  x  .  x  x
  • Tempo ≈ 126 BPM → phasor~ 0.525.
  • Two tap.808.kick~ objects, two rows. tuning is a ratio of the stock fundamental, so target Hz ÷ 49 ≈ your setting: kick A @tuning 1.0 (G1, where stock already sits), kick B @tuning 1.33 (≈ C2, the fourth). Both @decay 1.0 — the whole genre is that knob at the top.
  • @tone 0.2 keeps the click out of the way of the ring; @attack 0.5 softens the punch mechanism if the notes should bloom instead of hit.
  • tap.808.snare~ @snappy 0.8 @drive 6 — the swing-VCA drive is the crack that cuts through the sub.
  • Watch the sum: two ringing kicks stack. tap.limi~ on the bus is the modern answer; riding level per voice is the period one.

The 2010s: trap, and the arithmetic of rolls

Trap keeps Miami's tuned, sustained kick and moves the snare to beat 3 — the half-time frame — then spends all its rhythmic budget on hi-hat subdivision games. Those games are where this sequencer's phase-derived design pays off: rows of different lengths off one phasor divide the same bar differently, so a 32nd-note roll row and a 16th-triplet roll row are just length 32 and length 24 — polymeter as arithmetic, measured in the sequencer notebook.

step:              1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
kick:              X . . . . . . x . .  x  .  .  .  .  .
snare:             . . . . . . . . X .  .  .  .  .  .  .
closed (len 16):   x . x . x . x . x .  x  .  .  .  .  .
roll    (len 32):  steps 25–32 hit, plain    (32nds on beat 4)
triplet (len 24):  steps 19–24 hit, plain    (16th triplets, beats 3–4)
  • Tempo ≈ 140 BPM → phasor~ 0.5833.
  • Tune the kick to the song's key with the ratio table: E1 ≈ @tuning 0.83, F1 ≈ 0.88, G1 = 1.0, A1 ≈ 1.12. @decay 1.0 @tone 0.15, and keep sigh at its default 1.0 — the pitch relaxation is the 808-bass glide everyone samples.
  • The roll rows: program hits only on their last steps (as above), leave them muted (@mute 1), and unmute for the bar that needs the roll — or keep separate patterns in slots and recall. Fast rolls do not machine-gun: the voices' filter states persist across triggers, so a roll interferes with the ringing tail like hardware (pinned by the family's tests; see the drum machine chapter).
  • Alternate hat voicing per unit: @seed is which 808 you own, and @tolerance 0.3 puts the metal bank's oscillators off-grid the way resistor variance really does (Werner et al. measured up to ~20 % — the chapter has the numbers). Two hat objects, two seeds, panned, is a stereo kit for free.

What each ingredient buys

  1. The pattern and its accents. Four decades of genre difference above is mostly the grids. The accent flags are not dynamics polish — they are the hardware's second voicing per drum. Spend your time here.
  2. decay and tuning on the kick. One knob separates electro from Miami; one ratio puts the kick in the song's key.
  3. The composite backbeat. Clap + snare on one row (electro), or snare drive (Miami, trap) — the backbeat carries the genre signature after the kick.
  4. Polymeter rows for rolls. Two extra rows, two length values, and the trap chapter of the machine's biography writes itself.
  5. seed/tolerance on the metal. Seasoning, in the salt sense: invisible until you A/B two units.

When to leave the recipe

  • You want those records, exactly. Mix, tape, room, and a human on the start button are not in the box; at some point the honest tool is the actual sample.
  • You want velocity-per-step expression. The velocities list gives a row continuous 0..1 levels — but note it trades away the two-level hardware model; the accent bus is the 808's own idiom.
  • You want 909, LinnDrum, or DMX. Different circuits, different machines — this family models one instrument, and its refusal to be generic is the point.