The three pillars of this style: borrowed jazz harmony, a pushed bass, and deliberate space.
★ It is the most thoroughly validated style in this library——
mc-workflow/example-01-citypop.yaml is a fully filled-out ARR-SPEC (all 20 self-checks passed),
and much of the content below comes directly from it.
Which sections to read by task
| Task | Read |
|---|---|
| Determine whether these techniques can be carried over | ★ §2 Transfer table |
| Harmony | §3 |
| Groove "not moving forward" | ★ §4 Pushed bass |
| How to arrange the instrumentation | §5 + §5.2 Register discipline |
| How to divide the frequency bands | §6（A measured spectral budget） |
| The difference between R&B and city pop | §7 |
| Find a complete example | mc-workflow/example-01-citypop.yaml |
Boundaries
| Not covered here | Where it belongs |
|---|---|
| The complete system of jazz harmony | mc-style-jazz §3、mc-harmony |
| Specific progressions (Marusa, reverse cycle…) | mc-progressions |
| The general principles of pushing and dragging | mc-rhythm-section §3 |
| The general method for spectral budgeting | mc-texture-layering §4 |
| How to make synth timbres | mc-sound-design |
| Vocal arrangement | mc-vocal-direction |
1. Must fill in before starting
| Required | Question |
|---|---|
| ① City pop or R&B | ★ The groove and vocals of the two are completely different (§7) |
| ② Sense of era | 70s–80s original? 2010s revival? Or contemporary neo-soul? |
| ③ Does the groove push forward or sit back | ★ city pop Push forward，neo-soul Sit back. These are two directions |
| ④ Who is responsible for the "space" | ★ The character of this style comes from negative space,negative space must be assigned to someone |
2. ★ Transfer table
| Technique | Can it be carried over | Notes |
|---|---|---|
| Marusa progression (IV–III7–VIm–I) | ✅ Fully transferable | Already in mc-progressions §2.4. "Almost any melody placed on it sounds stylish" |
| F/G-type slash chords | ✅ Transferable | ≈ G7sus4(9), more restrained and refined than G7 |
| Seventh-chord-ization + moderate tension | ✅ Transferable | Butdensity must be controlled—full-on tension will turn it into jazz |
| Bass pushes, drums keep the grid | ✅ ★ Transferable, and it is the most valuable one | See §4 |
| Register limits of Rhodes / electric piano | ✅ Transferable | §5.2 |
| 16th-note muted strumming | ⚠️ Half transferable | A very strong style marker; carried into another style it will immediately be heard as city pop |
| gated snare | ⚠️ Half transferable | Strong 80s marker |
| Sax solo | ⚠️ Half transferable | Same as above, and it easily comes across as deliberately nostalgic |
| "Leaving space is the style" | ✅ ★ Can be borrowed, should be borrowed | See §8 |
★ Criteria：
Harmony and groove can be borrowed freely; timbres (muted strumming, gated snare, sax) are markers—borrow them and you'll be recognized.
3. Harmony
3.1 What it borrows is jazz, but with reduced density
| From jazz | city pop's usage |
|---|---|
| Seventh chords, ninth chords | ★ Seventh chords are the default, not an "upgrade option" |
| Tension notes 9/11/13 | Used, but one or two at a time, unlike jazz's full stack |
| ii–V, secondary dominants | Used extensively |
| Sus / slash-chord dominant substitutes | ★ F/G is a favorite |
| Altered dominants, diminished scale licks | ❌ Not used—that would turn it into jazz |
★ This distinction is the core of this skill： city pop's harmony is "jazz vocabulary + pop grammar." The vocabulary is fully borrowed, but the grammar (functional progression, sections, chorus-centeredness) remains pop.
3.2 Signature progressions
See mc-progressions：
- Marusa progression 4361（
IV–III7–VIm–I)—a synonym for city pop / neo-soul IV△7–IIIm7–IIm7–I△7— a pop/R&B standard ("Lovin' You"); ★ Inserting a #IVm7(♭5) before looping back is very stylishC△7–D7–F–F/G— a floating feeling; the V7 that the secondary dominant II7 points to never arrives
4. ★ Groove: pushed bass + grid-keeping drums
This is the most reproducible aspect of this style, and also the one most often done wrong.
Measured sample (example-01, 112 BPM)：
| Part | Offset | Function |
|---|---|---|
| Bass | −12 ms (pushed) | ★ The only source of this song's "rushing forward" feel |
| Clean guitar | +8 ms (dragged) | Pulls apart from the bass,creating an illusion of width |
| Drums | 0 | ★ Keep the grid, serve as the reference frame |
4.1 Why there must be one part keeping the grid
"Pushing" is relative. If everyone pushes together, it's just a slightly faster tempo, and you can't hear the rush forward. There must be an immovable reference point for the push to hold.
★ This is also mc-rhythm-section the concrete stylistic landing point of the §2.0 line "quantization is a per-instrument decision."
4.2 The relationship between bass and kick
city pop usually usesinterlocking（mc-rhythm-section §7.1)—
overlap to thicken the low end when needed, separate when not,preserving the bass's own melodic line。
★ The bass in this style is melodic, not just hitting rhythmic points.
4.3 feel
straight16(not swing). The density of 16th notes comes frommuted strumming, it does not come from swing — the two sound similar and are easy to confuse when judging, and choosing wrong will drag down the beat-pushing judgment in §4 (the baseline for the amount of beat-pushing is the "straight" grid; on a swing grid, the very phrase "how many ms of beat-pushing" does not hold). For the general steps of how to choose feel (style first then tempo, the backbeat criterion, how to handle intermediate gears like in the crack), see mc-rhythm-section §1.1; not repeated here.
5. Instrumentation
5.1 A measured roster (example-01)
| Instrument | Role | Frequency range | In / Out |
|---|---|---|---|
| Acoustic drums + gated snare(70s recording) | Groove | 60 Hz–12 kHz | A1 / end（The entire D section is silent） |
| Precision Bass, fingerstyle, short sustain | Low end | 40–250 Hz | A1 / end |
| Rhodes Mk I + light chorus | Harmonic bed | 200 Hz–2 kHz | I / end |
| Strat single-coil, 16th-note muted strumming | Texture | 1–3 kHz | A1 / C2(after ★ it no longer appears, giving the space to the sax) |
| Prophet-style sawtooth mono lead, slow portamento | Hook | 1.5–4 kHz | I / end（★ Plays only the hook, does no bedding） |
| String section, long notes in high positions | Color | 400 Hz–6 kHz | C1 / end (exits once at A2, returns at C2) |
| Tenor saxophone | Melody | 250 Hz–4 kHz | D / O（★ Enters past the halfway point of the whole piece; the Outro belongs to it） |
| Female vocals, breathy, not in-your-face | Melody | 200 Hz–8 kHz | A1 / C3（★ No vocals in the Outro） |
★ All three design points are expressions of this library's strong rules：
- The sax enters past the halfway point of the whole piece — the instrumentation must have a mid-piece entrance (59/59 strong rule）
- Guitar exits at C2, vocals exit at C3 — at least one part exits early (59/59 strong rule）
- The synth plays only the hook and does no bedding — non-vocal hook (lint #8)
5.2 ★ Register discipline
The place where this style most easily turns to mush is 200–500 Hz, because the Rhodes, strings, and vocals are all there.
Measured solution:
- Restrict the Rhodes to C3–C4
- Write the strings only above C4
★ This is the textbook use of "staggering registers"（mc-texture-layering §4.2 solution ②).
It is not cut with EQ; it is simply not written in when writing.
6. A measured spectral budget
| Frequency range | Belongs to | Contender | Solution |
|---|---|---|---|
| 40–120 Hz | Bass | Drums | Kick sidechains the Bass, 30 ms release; the Bass yields 3 dB at the Kick's hit point (frequency yielding） |
| 200–500 Hz | Rhodes | Strings, vocals | ★ Stagger registers: ep limited to C3–C4, strings written only above C4 |
| 1–3 kHz | Muted guitar | Synth lead | ★ Alternate: guitar only in the A/B sections, synth lead only in the gaps at the ends of phrases in the I/C/O sections |
| 6–12 kHz | Drums | Strings | Roll off the strings' highs at 8 kHz, leaving the air to the hi-hat |
★ Four conflicts, and all three solutions are used(frequency separation / staggered registers / alternating appearance) —
this is exactly mc-texture-layering the "choose one of three and state it explicitly" required by §4.2.
7. The divide between city pop and R&B
| city pop | R&B / neo-soul | |
|---|---|---|
| Groove direction | ★ Pushing forward(bass rushing the beat) | ★ Sitting back（laid back） |
| Vocals | Relatively straightforward, mixed further back | Heavy ornamentation, runs, ad-libs |
| Harmony | Jazz vocabulary + pop grammar | Closer to jazz,more tension |
| Instrumentation | Band instrumentation (drums, bass, guitar, keys + strings + horns) | More reliant onsamples and programming |
| Vocal layering | Harmonies added in the chorus | ★ Harmony stacking is the main device（mc-vocal-direction all four types in §5 are used) |
★ The two share harmonic vocabulary, but their groove directions are opposite. Putting city pop's rushed bass into neo-soul will directly destroy that style.
7.1 ★ One measured finding: R&B is the most "subtractive" style
In the warehouse's measured corpus, 10 hiphop-rnb tracks:
| Metric | hiphop-rnb | pop | jazz |
|---|---|---|---|
| Number of instruments that exit early (median) | ★ 28 | 16 | 10 |
| Proportion of instruments present from the opening | 24% | 21% | 16% |
How to read it: R&B/hip-hoplays out the fullest opening, but also withdraws the most— its sense of structure comes fromconstantly removing things, not constantly adding things.
★ Can be used directly: when writing R&B,subtraction_events should be written more than in other styles.
These 10 tracks in the corpus are a mixed hiphop-rnb set.The hip-hop side(the third sense of time, 808 role division, sample texture) is in
mc-style-hiphop; this section only covers the R&B half.
7.2 ★ Western R&B and Japanese R&B are two different things (Fujitani)
| Western R&B | Japanese R&B | |
|---|---|---|
| Notes | Few | Many |
| Character | Dark, cold | Shimmering, bright |
| Harmony | Jazz-influenced, often uses very complex chords |
(p0154). Before writing, first say clearly which one you want; the three letters "R&B" are not enough. Principle:When there are few notes, every note must sound good, otherwise the arrangement does not hold up; the beat is the lifeblood of R&B, and the timbres of the kick and snare must be carefully chosen (p0154).
7.3 Programming formulas for Western-oriented R&B (Fujitani p0157–0162)
- All drums use synth timbres, with the beat set in a hip hop manner; all three timbres must "sound like they were sampled from vinyl," thick and rough; the sampling characteristic is that when the kick and snare hit, the hi-hat resonates at the same time, and that is the groove (p0157)
- Two layers of kick: the main kick, plus an ultra-low kick that goes "poof,"appearing only at the start of the bar（p0157）
- Hi-hat plays eighth notes, with no velocity adjustment at all, input faintly grid by grid (p0160); fills go at the end of even-numbered bars, using a record-scratch sound effect (p0160)
- Bass plays only the root notes, it only falls on the eighth-note weak beats on the second half of the first and third beats; notes should be sustained as long as possible but not cover the beginning of the second and fourth beats—too long and it drags (p0161)
- The electric piano uses only half notes or whole notes, if the tremolo and timbre are good enough it feels comfortable; also use it for other types when you want a thick, expansive feel (p0162)
This is the exact opposite of the city pop groove in §4: there the bass rushes the beat and the drums hold the grid; here the bass has only two attack points and the hi-hat has no velocity. Under the same "R&B" label are two different sets of arrangement discipline.
8. ★ "Leaving space is the style"
The character of this stylecomes half from what is not played。
Three subtraction events in the measured samples:
| Position | What to do | Why |
|---|---|---|
| Before C2 | The last half beat is entirely silent (including drums) | ★ The second chorus cannot win over the first by being louder; it relies on that hole in front |
| Section D | Drums and basswithdraw for the entire section, leaving only electric piano + vocals + saxophone | ★ The lowest energy point of the whole song must be before C3, otherwise C3 does not work |
| A2 | Strings and half the guitars drop out | ★ The second verse should be emptier than the first, not fuller |
★★ All three of these reasons are worth remembering separately, they are general arrangement wisdom, not exclusive to this style
(→ mc-arrangement-arch §3）。
9. Correspondence with ARR-SPEC fields
| Field | This skill |
|---|---|
meta.style_layer |
mc-style-citypop-rnb |
groove.feel |
straight16 |
groove.push_pull |
★ §4 —— Bass negative, drums 0, this is the signature of the style |
arrangement.spectrum_budget |
§6 |
arrangement.roster[].note |
★ Range restrictions are written here (§5.2) |
arrangement.bass_kick_relation |
Interwoven |
subtraction_events |
§8. R&B should be written more (§7.1) |
10. Must-pass checks after writing
- Have distinguished city pop (forward) or R&B (backward)
- There is one instrument holding the gridas a frame of reference (§4.1)
- The basshas a melodic line, not just rhythmic hits
- Mid-low frequencies usestaggered rangesto solve it, not EQ cuts
- Every frequency conflict states which of the three solutions is used
- ★ There are clear subtraction events, and the reasons can be stated
- The memory-point instrumentonly plays the hook, it does not pad underneath
- At least one instrumententers after more than half the song, at least oneexits early
- When moving to another style, §2 has been checked—the timbre markers were not carried over too
Appendix: Sources
- ★
mc-workflow/example-01-citypop.yaml— the main basis of this skill. A fully filled-in ARR-SPEC,all 20 self-checks passed, can be directly used as a template to modify. - Measured data: repository measured corpus (10 hiphop-rnb tracks)
- Harmonic vocabulary:
mc-progressionsreference.md §2、§3 - This skill is built on top of example-01 and the general layer: the "rules" of city pop are basicallyjazz harmony + pop structure + a specific set of timbres。