Definition
K-pop (South Korean pop, from the 1990s onward, with the agency system of SM, YG, JYP, and today HYBE) has developed a recognizable way of composing: songs built by multiple writers, often in international song camps with Scandinavian, British, and American producers, designed for groups with many voices and for a choreography. The forms are described in the lesson “Forms of Contemporary Pop and K-pop”; here we describe the compositional method.
Compositional characteristics
- Highly contrasting sections: rap verse, melodic pre-chorus, chorus or drop, sometimes with a beat switch (a change of the underlying track, perceived tempo, or genre midway through the song).
- Vocal roles: the parts are written with the main vocal, lead vocal, sub vocal, and rapper in mind. Each section must give a moment to different members and let their timbres shine.
- Killing part: a moment of 2–4 bars, vocal or choreographic, designed to be remembered and reused in short videos.
- Repetitive, syllabic hooks: English words or onomatopoeia repeated as hooks, mixed with Korean.
- Strong pre-chorus: often more melodic than the chorus itself, with a rhythmic and harmonic build.
- Instrumental drop in place of a sung chorus: the “chorus” is an instrumental hook or a very short phrase over a drop (very common in girl crush and boy groups from 2015 onward).
- Dance break: 8–16 instrumental bars for the choreography, often before the last chorus.
- Bridge with a high note: the main vocal delivers a very high sustained note (for female voices often between C5 and E5; for male voices between G4 and C5 in full or mixed voice), sometimes with a key change.
Harmony
- International pop progressions (I–V–vi–IV, vi–IV–I–V) and many modal loops (Aeolian, Dorian).
- Modal borrowing and seventh and ninth chords derived from R&B and city pop: Fmaj7–E7–Am7 (IVmaj7–III7–vi7 in C), much loved in ballads and in the more “elegant” songs.
- Modulations up a semitone or a whole tone for the last chorus, especially in ballads.
- Key changes between sections: some songs shift to the relative minor or to another key at the beat switch.
Rhythm and genres
K-pop absorbs everything: EDM and future bass, trap, moombahton, house, jersey club, afrobeats, funk, city pop. BPMs range from 70 (ballads) to 160 and beyond (jersey club, drum and bass). A change of feel between sections (half-time in the pre-chorus, double-time in the drop) is typical.
Method: building a song in 8 steps
- 1. Concept: visual and narrative theme (girl crush, fresh/teen, dark, retro). The concept guides the sound and the lyrics.
- 2. Hook and killing part: write the most memorable motif first.
- 3. Modular track: prepare 2–3 versions of the track (trap verse, melodic pre-chorus, drop) in the same key or in nearby keys.
- 4. Member map: assign bars to the members (line distribution) according to timbre.
- 5. Topline per section: rhythmic verses, a rising pre-chorus, a syllabic chorus.
- 6. Vocal harmonies: stacks of thirds and sixths on the chorus, group unisons, ad-libs from the main vocal (see K-pop Vocal Harmonies).
- 7. Dance break and bridge: room for the choreography and for the high note.
- 8. Polish: clean transitions (1-beat silences, effects, spoken phrases), length often between 2:50 and 3:30.
Example of a form (indicative)
Intro (4) – Verse 1 rap (8) – Verse 1 sung (8) – Pre (8) – Chorus/drop (16) – Verse 2 (16) – Pre (8) – Chorus (16) – Bridge with high note (8) – Dance break (8) – Final chorus (16) – Outro (4).
Use in real songs
- BLACKPINK — DDU-DU DDU-DU (2018, produced by Teddy): chorus replaced by a drop with a short vocal hook.
- aespa — Next Level (2021): multiple sections with beat switches.
- BTS — Spring Day (2017): a more lyrical construction, gradual growth toward the bridge.
- NewJeans — songs from 2022–2023 with jersey club and 1990s–2000s R&B influences.
Common mistakes
- Contrasting sections without connections: you need a common element (motif, sound, key) that holds the song together.
- Lines that are too difficult for all the members: the parts must be adapted to each member's real range.
- Forgetting the choreography: the rhythm of the hook must be “danceable” and visual.
Practical exercise
Write a K-pop song for a group of 4 voices in A minor: a trap verse at 140 BPM (half-time), a pre-chorus that rises in sixteenth notes, a future bass drop with a hook of 2 repeated words, a bridge with a sustained note on C5, and an 8-bar dance break. Prepare a line distribution table.
Related topics
Forms of Contemporary Pop and K-pop, K-pop Arranging, Vocal Harmonies of K-pop and Boy Bands, Topline, Building the Chorus.