Girl crush

History and character

“Girl crush” is the K-pop concept for female groups that rejects the sweet, “cute” image and focuses on confidence, strength, independence and an aggressive aesthetic. The foundations were laid by 2NE1 in the late 2000s with Teddy Park's production at YG (I Am the Best, 2011); before that there were the strong songs of BoA and Lee Hyori, and in parallel Brown Eyed Girls, 4Minute and miss A. In the 2010s the concept became dominant: BLACKPINK (DDU-DU DDU-DU, 2018; Kill This Love, 2019, again with Teddy and The Black Label), then in the 4th generation ITZY (Dalla Dalla, Wannabe, JYP), (G)I-DLE (with the leader Soyeon as writer and producer: Tomboy, Nxde, Queencard), aespa (Black Mamba, Savage, Next Level, Supernova, with Yoo Young-jin and the SMP sound), Everglow, LE SSERAFIM (Antifragile), BABYMONSTER, KISS OF LIFE.

Musically, girl crush combines trap, EDM (dubstep, big room, moombahton), hip hop and sometimes rock, with brass, sirens, distorted synths and shouted or spoken hooks (“sing-talk”). It lives on contrasts: minimal, menacing verses, melodic pre-choruses with harmonies, explosive drops often without a sung melody (just a chant or a single word), a melodic bridge with the main vocal's belting and an even fuller final drop. aespa's Savage, for example, has been described as EDM trap with dubstep and hyperpop elements, with “clanging” instruments reminiscent of SOPHIE.

The aesthetic includes self-affirming lyrics, English phrases as slogans, powerful, synchronized choreography, sampled laughs and screams, and references to action films and the military world (marching snares, sirens).

Scales and keys

Natural minor (Aeolian)

• Formula: 1 2 b3 4 5 b6 b7 (T S T T S T T). In B: B C# D E F# G A.
• Characteristic note: b6 (G): dark, epic.
• Chords: i Bm – ii° C#dim – III D – iv Em – v F#m – VI G – VII A.
• Use: i–VI loops in the drops, i–VI–III–VII in the sung choruses, VI–VII–i pre-choruses.
• Example: BLACKPINK — DDU-DU DDU-DU (B minor).
• Mistakes: too much harmony in the drop: the girl crush drop is a riff, not a chord progression.

Phrygian

• Formula: 1 b2 b3 4 5 b6 b7 (S T T T S T T). In E Phrygian: E F G A B C D.
• Characteristic note: b2 (F): menace, an “exotic” and tense flavor.
• Chords (on the mode's scale): i Em – II F – III G – iv Am – v° Bdim – VI C – vii Dm.
• Use: bass/brass/synth riffs that oscillate 1–b2, sirens that fall onto the b2, tense verses.
• Mistakes: using the b2 in the pre-chorus melody too: there you need Aeolian (singable).

Harmonic minor

• Formula: 1 2 b3 4 5 b6 7 (T S T T S 1½T S). In A: A B C D E F G#.
• Characteristic note: leading tone G# and the augmented second F–G#: “action movie” drama.
• Key chords: V E (E7), vii° G#dim.
• Use: verse riffs, string lines, last bar of the pre-chorus (major V).

Minor pentatonic and blues scale

• Minor pentatonic: 1 b3 4 5 b7 — in B: B D E F# A. Blues: + b5 (F).
• Use: rap hooks, chants, brass riffs; the b5 for “dirty” riffs.
• Example: many girl crush chorus chants sit on 2–3 notes of the pentatonic.

Relative major (for bridges and melodic choruses)

• In D major (relative of B minor): D E F# G A B C#. The bridge often moves to the relative with maj7 for the vocal moment.

How to choose

Harmony

Function

The verses and drops are nearly atonal, built on one or two bass notes and on brass or synth riffs. The pre-choruses are melodic, with rising minor progressions (VI–VII–i, iv–v–VI–VII) and vocal harmonies. The bridges move to softer harmony (maj7, relative major) for the vocal moment, then return to the drop.

Techniques

• Riff = harmony: a 1–2 bar ostinato (bass + brass + synth in unison or octaves) defines the section.
• Tonic pedal with changing chords above in the pre-choruses.
• Open fifths and octaves instead of triads in the drops (hard sound).
• Major V from the harmonic minor for tension.
• Key change in the bridge or modulation of the last drop (less frequent: the drop is more often strengthened with new layers).

Harmonic rhythm

Drop: one “chord” (or note) per 2–4 bars. Pre-chorus: one chord per bar or two. Bridge: one chord per bar, with sevenths.

Typical progressions

Rhythm and groove

Continuous contrast: half-time trap verses (triplet hi-hats and rolls), straight pre-choruses (often a four-on-the-floor kick that thins out), drops with a heavy kick on the beats and a clap on 3 (felt as half-time) or moombahton/dembow drops. A one-bar stop before the drop, often with a spoken phrase or a shouted word. 0% swing; everything is quantized for the choreography; ensemble accents (“hits”) on the points of the point choreography.

Drums

Kick

Verse: syncopated kick + 808 (steps 1, 7, 11 in half-time sixteenth notes). Drop: distorted EDM kick on 1 and 3 of the half-time or in four; in moombahton drops, kick on 1, 5, 9, 13 with the dembow above. Hard, short sound, click at 3–5 kHz, often saturated.

Snare and clap

On 3 (half-time), layered (clap + snare + snap); in the drop a huge snare with short reverb; snare rolls building in the builds (eighth notes → sixteenth notes → thirty-second notes over 2–4 bars); military snares (marching) as a layer in the stronger concepts.

Hi-hat and percussion

Hats in sixteenth notes and triplets with trap rolls; martial percussion (taiko, bass drum), stomp-claps in the dance breaks; gong hits and metallic sounds; sirens as percussion.

Interaction with bass and vocal

Rap verse with dry drums and the 808 centered; in the drops the drums are on a par with the riff; the chant leans on the kick and clap accents.

By section

Fills and transitions

Risers, sirens, snare rolls, impacts with sub drops, tape stops, sampled laughs or screams, a total stop with a spoken phrase.

Sounds and mistakes

Distorted kicks, layered claps, saturated 808s, orchestral percussion. Mistakes: a drop that doesn't “explode” because the pre-chorus is already full; snare roll too long; martial percussion that covers the chant.

Bass

• Sound: long 808s with glide and distortion in the verses; in the drops a reese, saw or dubstep growl bass syncopated against the kick; sometimes a distorted electric bass.
• Notes: root, b2, fifth; octave slides at the end of phrases; in the drops the bass plays the riff in unison with the brass.
• Relationship with the kick: short kick over the 808's attack; 4–6 dB sidechain in the EDM drops.
• Examples: BLACKPINK — DDU-DU DDU-DU (drop on a bass and synth riff), aespa — Savage (bass and drums as the main element).

Harmonic instruments

Synthesized or sampled brass (stabs), aggressive distorted synth leads, sirens, dark pads in the pre-choruses, orchestral strings (staccato and ostinato) for intros and drops, distorted electric guitars in some songs, piano in the bridge. Voicings in fifths and octaves in the hooks, triads or sevenths in the pre-choruses and the bridge.

Melody and vocals

• Vocals: confident and sharp; aggressive rap in the verses (main rapper), spoken, shouted or “sing-talk” hooks, group chants in unison or octaves (gang vocal) in the hooks and drops.
• Pre-chorus: melodic, sung by the lead vocal with group harmonies a third above.
• Bridge: main vocal with belting and high notes, ad-libs in the final drop.
• Effects and details: whispers, English phrases as slogans, sampled laughs and screams, voices pitched down for the “menacing” effect, Auto-Tune as color in the rap.

Instruments

Vocals (rap, singing, chant, gang vocal), 808, drum machine and samples (distorted kicks, claps, military snares), synth bass (reese, growl), brass, synth leads and sirens, martial and orchestral percussion, strings, distorted guitars, piano.

Drum patterns

Synths and sounds

• Korg MS-20 V — Aggressive leads and sirens: The MS-20's saturated filter is perfect for sharp leads and sirens: high resonance and an LFO on the pitch.
• OP-Xa V — Synth brass: Big, full-bodied brass for the hook stabs.
• ARP 2600 V — Effects and basses: Sound design for sweeps, risers and gritty basses.
• Mini V — Synth bass: Distorted saw basses and reese (two detuned saws) for the drops.
• Matrix-12 V — Complex pads and leads: Deep modulation for evolving leads and dark pads.
• Augmented Voices — Menacing choirs: Dark choir pads for intros and builds.
• Augmented Strings — Hybrid strings: Staccato string ostinatos for cinematic intros and drops.

Song structure

Length 3:00–3:30.

Mixing and mastering

Sonic goal

Huge bass and kick, sharp brass and leads, sharp and clear vocals, maximum contrast between verse and drop. References: BLACKPINK — DDU-DU DDU-DU, BLACKPINK — Kill This Love, aespa — Savage, (G)I-DLE — Tomboy, ITZY — Wannabe.

Kick

EQ: HP 25 Hz, +3 dB at 50–60 Hz, −4 dB at 300–400 Hz, +3/+4 dB at 3–5 kHz. Clipper 1–2 dB, transient shaper. Saturation/distortion. Center.

Snare, clap, military snares

EQ: HP 150 Hz; body 200–250 Hz; crack +3 dB at 3–5 kHz. FET 4:1 + heavy parallel. Plate 0.8 s. Military snares in wide stereo with a big room.

Hi-hat and percussion

HP 500 Hz, −2 dB at 7 kHz. Taiko and bass drum centered with 1.5–2 s room reverb; metallic percussion wide.

808 and basses

EQ: HP 25 Hz, sub 40–55 Hz, −2 dB at 200 Hz, presence 800 Hz–1.5 kHz. Heavy saturation on the mid layer (Decapitator “P”, Trash 2, Fruity Blood Overdrive), clean sub. Clipper. Mono below 150 Hz. Sidechain from the kick 4–6 dB in the drops.

Brass, leads, sirens, strings

EQ: HP 200 Hz; presence +2/+3 dB at 1–4 kHz; dynamic dip at 2–4 kHz from the vocals. Parallel distortion on the brass. Stereo: centered brass stabs + wide layers; sirens with automated panning; wide strings with a 2 s hall.

Vocals

• Rap: HP 100 Hz, compression 8–10 dB, saturation, presence 3–5 kHz, L/R dubs.
• Singing: serial chain (1176 + LA-2A), de-esser, short plate + tempo-synced delay.
• Chant/gang vocal: bus with 10 dB of compression, saturation, wide doubles, room.
• Each member with a slightly different presence EQ for recognizability.

FX

Risers, impacts, laughs and screams: FX bus with HP 200 Hz and limiter; automation so they don't cover the vocals.

Buses and groups

Drum bus 4:1 with clipper; vocal bus 2–3 dB with saturation; music bus with dynamic ducking from the vocals.

Sidechain

Kick → 808/basses (4–6 dB), pads (3 dB); vocal bus → brass/leads (1–3 dB at 1–4 kHz).

Master

Chain EQ → compressor 1–2 dB → clipper → limiter. Target −6/−5 LUFS integrated (drops −4/−3 short-term), true peak ≤ −1 dBTP, PLR 6–8 dB.

Common mistakes

Unsaturated 808 (it disappears on TV and phones); brass and vocals clashing at 2–4 kHz; a drop only slightly louder than the verse; too much distortion on the master.

Reference tracks for the mix

BLACKPINK — DDU-DU DDU-DU (2018); BLACKPINK — Kill This Love (2019); aespa — Savage (2021); (G)I-DLE — Tomboy (2022); ITZY — Wannabe (2020).

Reference listening

• 2NE1 — I Am the Best (2011)
• BLACKPINK — DDU-DU DDU-DU (2018)
• BLACKPINK — Kill This Love (2019)
• ITZY — Dalla Dalla (2019)
• ITZY — Wannabe (2020)
• aespa — Black Mamba (2020)
• aespa — Savage (2021)
• (G)I-DLE — Tomboy (2022)
• LE SSERAFIM — Antifragile (2022)
• BABYMONSTER — Sheesh (2024)