The units of measure: bars and verses
In hip hop the measure is called a bar: 4 beats. Sections have very standardized lengths:
- Verse: traditionally 16 bars ("sixteens," a 16); on collaborations the feature usually gets a 16-bar verse. Verses of 8, 12, 24 or 32 bars also exist.
- Hook / chorus: usually 8 bars (a 4-bar phrase repeated), sung or rapped.
- Intro and outro: 4–8 bars.
- Pre-hook: 4 bars in melodic rap and modern trap.
- Bridge: 4–8 bars, rare in boom bap, more frequent in crossover pop-rap tracks.
For rappers, a bar also corresponds to a line of the lyrics (often with the rhyme at the end of the bar).
The classic form (1990s–2000s)
| Section | Bars | Notes |
|---|---|---|
| Intro | 4–8 | beat, spoken voice, sample |
| Verse 1 | 16 | lead rapper |
| Hook | 8 | often with a vocal sample or a sung part |
| Verse 2 | 16 | |
| Hook | 8 | |
| Verse 3 (or bridge) | 16 (or 8) | often a guest |
| Hook | 8 | possibly repeated ×2 |
| Outro | 4–8 |
Typical length at 85–95 BPM (boom bap): 3:30–4:30.
The form of trap and contemporary rap
- Hook at the start: many tracks begin directly with the chorus to capture listeners in the first seconds on streaming.
- Shorter or irregular verses: 12, 20, 24 bars.
- Reduced length: often 2:00–3:00.
- Tempo 130–160 BPM felt in half-time (65–80): a "bar" in half-time can hold twice as many syllables.
- Typical forms: Hook (8) – Verse (16) – Hook (8) – Verse (16) – Hook (8) – Outro; or Intro – Verse – Hook – Verse – Hook with no third verse.
The beat switch
The beat switch is a change of production (beat, tempo, key or feel) within the same track, which creates a "paneled" form:
- Travis Scott, "Sicko Mode" (2018): three parts with different beats, tempo changes and a guest (Drake), with no recurring traditional hook.
- Kendrick Lamar, "DNA." (2017): midway through the track the beat changes completely and the flow becomes more aggressive.
The beat switch often replaces the bridge: it signals a change of perspective or energy.
Arrangement tools within the form
- Drop-out: the drums or bass stop for a bar before the chorus or on a punchline (leaving the voice alone).
- Beat variation between verses: verse 2 has denser hi-hats, a counter-sample, a different bass.
- Ad-libs: interjections by the rapper (often doubled and panned) that fill the end of the bars.
- Producer tag: the producer's signature in the first bars.
- Sung vocal hook (often by an R&B singer) that creates contrast with the rap.
How to analyze a hip hop track
- Find the BPM and decide whether the track is felt in half-time.
- Count the bars of each section from the start (mark 1 on the first kick hit of the full beat).
- For each section note: who raps/sings, what changes in the beat (elements coming in and out), where the drop-outs are.
- Analyze the rhyme scheme (where the rhymes fall in the bar: end of bar, internal, multisyllabic) and the flow (see the dedicated entry).
- Mark the beat switches and their purpose.
Exercise for a producer
- Build a boom bap beat at 90 BPM with a 2-bar loop.
- Arrange it: intro 4 bars (filtered sample only), verse 16 (full beat), hook 8 (add a pad or a counter-vocal), verse 16 with varied hi-hats and a drop-out at bar 8, hook 8, verse 3 on a beat switch (same key, half-time drums, new bass), final hook ×2, outro 4.
- Export and count the bars: every change must fall on the start of a 4- or 8-bar phrase.
Related entries
Flow and rhythmic writing in rap, Verse–chorus form, Electronic music forms, Dance break and beat switch in K-pop, Meter, subdivision, half-time and double-time, Writing 808 lines.