lw-structure

Lyric Structure (词的结构)

Structure is not about "what to write," it's about "when to say it, and whether it's been said."

Pattison states it plainly from the outset: good structurecannot replacegood writing; it is only one part of good writing; what structure has to handle istiming and placement（manage timing and placement）。 —— Pattison《Lyric Form》p0004

Which sections to read by task

Task	Read
Lay out the sections before writing	§1 → §2 → §3
The chorus doesn't sound like it "arrives"	§2.4 ＋ §5
The bridge is written like just another verse	★ §2.5
Where the title goes, how many times it appears	§4
Every section is the same length, equally neat	★ §5 ＋ §6
You want a certain line to be heard	★ §5.6 (place it in the closed position)
The sections don't line up with the bars of the arrangement	§7
LYR-LINT items 3/4/10 don't pass	§6

Boundaries

Not handled here	Handled where
What this song is saying, to whom, at which moment (the five questions of premise)	lw-song-intent
Imagery, concrete nouns, object writing	lw-imagery
Rhyme itself: choice of rhyme scheme, rhyme categories, when to deliberately not rhyme	lw-rhyme(★ This skill only treatsrhyme positionas a structural variable, see §5.5)
Person, perspective, time anchor, negative space	lw-narrative
Tone distortion, phonetic harmony	lw-tone-check
The arrangement energy of sections, entrances and exits of instrumentation, the bar counts themselves	Composition and arrangement

★ The dividing line with composition and arrangement：The section functions of the lyric belong here; the bar counts of the song form belong to composition and arrangement; section ids (form[].id) are shared by both sides; whoever does it first defines it (§7).

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1. General principle: a lyric has only two verbs

MOVING and STOPPING. The work of every lyric section can be seen from one of these two. —— Pattison, Lyric Form, p0052

From this derives the entire content of this skill, in one sentence:

Balance (symmetry) brings motion to a stop; imbalance (asymmetry) pushes the lyric forward. —— Pattison《Lyric Form》p0063

1.1 Central sections and developmental sections

Pattison divides all sections into two categories (Lyric Form, p0052):

Category	What it holds	Structural task
CENTRAL SECTION	CENTRAL IDEA— the main information of this lyric	Stop. Here the idea is completed
DEVELOPMENTAL SECTION	Ideas that lead toward or develop the central idea	Push forward, pushing all the way to the central section

★ Everything in the lyric either moves toward the central section or moves away from it.（《Lyric Form》p0052）

This directly determines where you should put your effort: No matter how beautifully a developmental section is written, if it stops on its own, the central section won't feel like it "arrives."

Self-check action: write down a list of section names, and after each write → (push) or ■（stop）。 If two ■ appear in a row, or it is all → from beginning to end, the structure has a problem.

1.2 The four balls

Pattison compares lyric writing to juggling: when writing any stretch of lyrics, you are juggling four balls at once (《Lyric Form》p0007–p0008)——

1. How many lines will I use?（How many phrases）
2. How long is each line?（How long will each phrase be）
3. What rhythm does each line use?（What rhythms）
4. How are the rhymes arranged?（How should I arrange the rhymes）

★ These four are all the variables that make up a section（《Lyric Form》p0063）。 §5 explains one by one how to use them.

⚠ Note that the fourth ball is jointly managed in this library： Which words to choose for the rhyme belongs to lw-rhyme, and which line the rhyme falls on belongs here.

1.3 What is a “line”

Pattison’s definition of phrase:A sentence, or a naturally valid fragment within a sentence (a clause)； A lyric line and a melodic phrase usually correspond one to one（《Lyric Form》p0008）。

“Like a loving couple, lyric phrases and musical phrases should match. Making them out of sync usually leads to disaster.” —— Pattison《Lyric Form》p0010

★★ This is where putting music first and lyrics second most easily goes wrong: A complete meaning split across two musical phrases will sound very strange andtake the emotion away（《Lyric Form》p0010）。

Failure condition: If your lyrics are being set to an existing melody, first mark your own semantic breaks with slashes, then check them once against the melody’s phrase boundaries—— Where the two lines do not overlap, change the lyrics, not the music。

★ In LYR-SPEC,prosody.sections[].syllables one element = one line in the lyric draft = one line. Line breaks are not typography, they are instructions.

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2. Section types and functions

For the complete function table of each section type (the respective tasks, progression of information density, and common failures of verse / pre-chorus / chorus / bridge), see reference.md. The following two items are Stolpe’s skeleton for "how to arrange within a section and how to push from section to section," and the function table grows on top of them.

2.1 ★ Toggling: within a section, external details and internal details alternate

External detailswrite what is happening around the protagonist,internal detailswrite what is happening in the protagonist’s heart or mind (p0006). A line can have both; abstract or metaphorical description pushes external details toward internal.

Toggling isarranging these two kinds of details in alternation, with four goals (p0006): proper section weight, contrast between sections, a stronger experience, and putting the best ideas where they belong.

The book’s six-line example is arranged as E · E/I · I · E · E/I · I: the pattern established in the first half repeats in the second half, where the musical phrases begin and end is also where the Toggling pattern begins and ends（p0006）。

★ Power position: the last line of a section naturally bears the responsibility of summarizing the whole section.Change the last line from external to internal, and the section gains a sense of closure (p0006).

Three kinds of misarrangement（p0006）：

Arrangement	Consequence
The second half is all internal	It becomestellingthe audience how the protagonist feels, rather than letting the audienceexperienceit
The second half is all external	Heavy; the listener doesn't know what these images have to do with the main idea
The first half is all internal	External details are postponed until the middle of the paragraph. The book's metaphor issalting after eating the steak

Self-check: Label each line E or I, see whether the pattern is broken, and see whether the last line is I.

2.2 ★ Pyramiding: Between paragraphs, push from close-up to panorama

The song's ideaadvances from narrow to wide, from zooming in to pulling back, like a camera, and also like the shape of a Christmas tree (p0008):

Layer	Paragraph	Field of view
Top	Verse	Narrowest
Middle	Pre-chorus	Slightly wider
Bottom	Chorus	Widest
Lowest branch	Title line	Widest

The last line of each paragraph is usually an internal detail, and its function is topull the camera back and assign value to the details before it（p0008）。

Three kinds of pushing wrong(p0008): if the end of the paragraph refocuses on an external detail, the detail becomes disconnected from the main idea; if the field of view at the start of the paragraph is too wide, there is no room left to expand at the end;if the chorus zooms in more than the verse, the listener won't believe this is the main idea。

The second verse should pull back one more level relative to the first verse(p0008): more internal, deepening the meaning of the chorus, not necessarily tied to a particular event or time frame. Sometimes it continues external details in order to move to the past or future,recoloring the next chorus。

These two points go together with lw-song-intent the type table in §1.2: the narrative second verse advances through new events, while the other three types advance by pulling the camera back.Pulling back is also advancing, not restating.

3. Song Form

3.1 Song System: A unit larger than a "paragraph"

Song System = a group of paragraphs working together in a larger cycle of motion. It always contains a central paragraph, and usually also one or more development paragraphs. —— Pattison, Lyric Form, p0056

• verse / chorus / verse / chorus = Two Song Systems（《Lyric Form》p0056）
• Each Song System is a cycle that closes after the central paragraph; once a system has run its course,you must start something new, or end the song（《Lyric Form》p0056）
• ⚠ Scope of application: most useful when the paragraph types differ (verse+chorus, verse+bridge+chorus); if all paragraphs are the same and all carry the central idea, this concept doesn't help (Lyric Form p0056)

★ This is what you should really count when ordering paragraphs: not how many paragraphs you counted, buthow many cycles you counted。

3.2 The general principle for choosing form

「Content dictates form." (Content determines form.) Only the right form can support and strengthen the lyric's purpose and deliver the result you want. —— Davis《Successful》p0032

★ The two are not contradictory：Content determines whether you push or stop (Davis), and push/stop determines form (Pattison).

3.3 The character of common forms (the two side by side)

Form	Structural principle	Character / Use
Verse/Refrain	Doggerel principle:Statement A → Restatement A → Variation B → Return A（Pattison《Lyric Form》p0070）	Create tension and resolution by "establishing a home base and then leaving it"; narrative, talky songs
AAA	Sections are independent of each other,with no bridge and no chorus, each section is often 16 bars (Davis, Successful, p0036–p0038)	★ Best suited for creating characters, changing time frames, changing scenes; ⚠ the melody is most likely to become a monotonous rhythmic engine
AABA	Traditional 32 bars = 8/8/8/8, but the bar countneed not be regular（Davis《Successful》p0040–p0041）	★ Express the emotion of a single moment without interruption；Almost requires a single time frame, a consistent point of view, and an unchanging scene(Davis p0040). The bridge takes you away from the home base, and returning to the third A section is the "true homecoming" (Pattison p0058)
ABAB / ABAC	Two 16-bar sections joined together (Davis, Successful, p0044)	The C section of ABAC is heard only once, suitable for continuing to develop the lyrics (Davis p0045–p0046)
Verse/Chorus	Common Meter (narrative stanza) principle (Pattison, Lyric Form, p0072)	Verses handle development, choruses handle closure;the central section stands alone as its own section, and repetition is the least effort
Verse/Climb/Chorus	Add one level of imbalance within a Song System (Pattison p0060; Davis calls it climb, Successful, p0054)	The chorus feels more "worth it"; ★ when the climb is long enough and contrasting enough, the song does not need a bridge（Davis p0054）
Verse/Chorus + Bridge	bridge Inserted after two complete Song Systems（Pattison p0059）	At this pointeach verse/chorus system is equivalent to one A in AABA; ⚠ Davis considers the bridge here pleasant but unnecessary（《Successful》p0052）
Only verses	The verses themselves are the central section	★ Be sure to make them interesting—there is no contrasting section to fall back on (Pattison p0053–p0054)

★ When adding something more to an A-B-A-B system, Pattison recommends adding a bridge rather than adding another verse, the reason being to avoid the boredom caused by repetition (Lyric Form p0075).

For the bar counts, title placement, and variants of each form (including 12-bar blues and through-composed), see reference.md §1.

3.4 The internal logic of A-B-A-B

Pattison breaks the four-line A-B-A-B into (Lyric Form p0073): Statement A → new statement B → restatement of the structure of line 1, A → restatement of the structure of line 2, B.

★ This "statement—restatement" logic is the samewithin a line, within a section, and between sections—— This is the most effort-saving insight in this skill: you only need to learn one layer, and the other layers copy it.

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4. Hook and title

4.1 In lyrics, the hook is the title

Corpus measurement: the most catchy line is in the chorus62% at the start of the section, 22% at the end of the section, 10% at both start and end(Mandarin non-rap n=487; this column had only 59% agreement between two models' blind judgments, so treat it as a rough reference); rap 48% at the start of the section, 22% at both start and end (n=100); Cantonese 56% at the start of the section (n=36).

"In lyrics, 'HOOK' means (or should mean) 'TITLE'. It is the focused statement of the central idea.」 —— Pattison《Lyric Form》p0062

⚠ Note that this differs from the usage in arranging: the hook in arranging refers to a recurringsound event。 The hook of the words = the title; the hook of the music = that motif. The two can reinforce each other, but they are not the same thing.

★ Davis's definition is broader：

A hook is the part of a song that grabs the listener's attention and stays in memory after one listen. Usually a song's title is its hook. A secondary hook can be an instrumental phrase, or a catchy rhythmic groove. —— Davis《Successful》p0055

★★ How to use these two definitions： When writing lyrics, use Pattison's narrow definition(otherwise "hook" becomes a word you can't act on); when handing off to arranging, use Davis's broad definition—instrumental hooks and groove hooks belong to composition and arranging, butthey should land in the same place as the hook of the words。

4.2 Where to put it: hot spots

The hook placements Pattison lists (Lyric Form p0062):

• Balanced position（balancing position）
• Deceptive position（deceptive position）
• Surprise position（unexpected position）
• The first and/or last line of the chorus

「The beginning and the end. Two hot spots (HOT SPOTS).」 —— Pattison《Lyric Form》p0083

★★ The line most worth remembering：

「Whatever idea you put in a hot spot becomes your most important idea. You make it important by putting it there.」 —— Pattison《Lyric Form》p0084

Corollary：Don't agonize over "which line is my most important meaning"—first decide which line to put in the hot spot.

⚠ Constraints in verse/refrain form（《Lyric Form》p0083）： Usually the hook is either at the start of the section or at the end of the section, and generally not both— putting it in both places means every verse has to use it twice,usually too many。

4.2b ★ Start of section or end of section: the two sources disagree

Pattison treats the beginning and the end as two equivalent hot spots（《Lyric Form》p0083）。 Davis gives a ranking within the verse/chorus form：

Putting the title at the top of the chorus undoubtedly creates the greatest impact and staying power. A title on the last line is a weaker choice: although it can also produce hits, itrequires the listener to wait too long to know what the song is about, often gives the impression of "evolving by default" rather than "being designed," andrarely produces covers。 —— Davis《Successful》p0051

★ A non-conflicting reading—it depends on the form：

Form	Title position	Basis
AAA	At the start of each section or at the end of each section,either is fine	Davis《Successful》p0037
AABA	At the start of the A section or at the end of the A section, either is fine	Davis《Successful》p0041
ABAB / ABAC	The first line or the last line of each AB/AC	Davis《Successful》p0046
Verse/Chorus	★ Prefer the top line of the chorus	Davis《Successful》p0051
Verse/Refrain	Start of section or end of section, ★ generally not both	Pattison《Lyric Form》p0083

★★ A supplementary point common across forms（Davis《Successful》p0041）： Even if the title is at the beginning, a good craftsman will shape the last section so that the title rings out once more at the end of the song, so that it stays in the listener's memory.

For whether the title itself is qualified (three criteria, the multiple-choice problem, "leave the title to the title"), see reference.md §4.

4.3 How many times it appears

「Your HOOK should appear at least once in every Song System. Usually that is enough.」 —— Pattison《Lyric Form》p0086

★ "Once per Song System" is a floor, not a metronome. Pattison also points outdirect repetition is simple but effective(Lyric Form, p0086), and gives the example of a hook appearing once at the beginning and once at the end of the chorus (A SLOW HEALING HEART, Lyric Form, p0083).

★★ The best reason to repeat is that the structure requires it(Lyric Form, p0087): in the example he gives, the sectionis only completed into balance by that final repetition—— Here repetition is not laziness, it is balancing.

Self-check action: cross out the final hook and recount the number of lines and the number of stresses. If the section becomes balanced after crossing it out, that repetition was superfluous; if the section becomes lopsided after crossing it out, it is a structural component.

4.4 Five strategies for making the hook the protagonist

Pattison's five (Lyric Form, p0082, p0092):

1. Put the hook at the beginning or end of the section, or both(for limitations see §4.2)
2. Let the structure push forward all the way until it hits the hook—in a central section, rhythm and rhyme push all the way through,and only when it lands on the hook does it light up, balance, and close the section; in a development section,use imbalance to push forward, and let the next section begin with the hook (p0085)
3. Repeat the hook(see §4.3)
4. Use sound to light the hook(he calls it TARGETING)—★ tune the ear in advance with the vowels that appear in the hook. He gives "I CAN'T FIGHT THIS FEELING ANY MORE":three "ite" sounds set up the most important word in the hook, "feeling"（p0088）
5. ★ Use the hook's rhythm in other strategic positions—equivalent tomotivic developmentin composition: state the theme, then use it again elsewhere in different ways (faster, slower, inverted, same shape with altered pitches) (p0089)

★★ Item 5 comes with a hard requirement about working order：

「Before you start writing your lyrics, know the rhythm of your HOOK first.」 —— Pattison《Lyric Form》p0089

Two reasons（《Lyric Form》p0089）： First, it is a way of repeating the theme without being annoying; second, it makes the theme the focus of the whole work. Bonus benefit：The line lengths and rhythm choices of the verses are therefore no longer arbitrary.

⚠ Items 4 and 5 need conversion in Chinese: vowel setup corresponds tothe early appearance of finals, and the hook's rhythm corresponds tothe number of characters and the placement of pauses in those characters。 Tones are counted separately, under lw-tone-check。

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5. ★ Stability and instability of sentence patterns

This is the core of Pattison, and also the section this skill should write through most thoroughly.

5.1 A section has only four variables

（《Lyric Form》p0063）

1. Number of lines（Number of phrases）
2. Line length（Length of phrases）
3. Rhythm of each line（Rhythm of phrases）
4. Rhyme scheme（Rhyme scheme）

★ To change the feel of a section, you can only work from these four. Each is discussed below.

5.2 Variable one: number of lines—odd or even decides "whether it is finished"

Even-numbered lines make the structure feel balanced; odd-numbered lines feel awkward. Unbalanced paragraphs create a "sense of forward motion," while balanced paragraphs "stop moving." —— Pattison《Lyric Form》p0011

Three uses of balance/imbalance（《Lyric Form》p0011）：

★ Full text and examples in reference-stability.md。

5.3 Variable Two: Line Length — Control speed, not speed itself

Like a juggler, the goal is not to go faster, but to control speed. Line length is one of the strongest speed controllers. —— Pattison《Lyric Form》p0015

★ Full text and examples in reference-stability.md。

5.4 Variable Three: Rhythm — Count stresses, not total syllables

The criterion for judging whether a line is long or short is not counting the total number of syllables, but counting the number of stressed syllables. —— Pattison《Lyric Form》p0029

PARADIGM 1: Alternating four-stress and three-stress lines = Common Meter（《Lyric Form》p0029）。 Secondary stress does not change the pattern, and a non-stressed pickup at the start of a line does not change the pattern either. ★ It remains common today because it fits perfectly with the various subdivisions of eight-bar phrases: in 4/4 time, the first four-stress line occupies exactly two bars；The rest on the third beat of the fourth bar is used to separate the second line from the first, and at the same time this rest defines the four-bar phrase（p0030）。

★ Full text and examples in reference-stability.md。

5.5 Variable Four: Position of the Rhyme

⚠ Which words to choose for the rhyme belongs to lw-rhyme. Here we only discuss its role as a structural variable.

Rhyming is the most effective tool for controlling "movement and stopping." —— Pattison《Lyric Form》p0038

It controls five things at once(Lyric Form p0038): balance / speed / flow / closure / type of closure.

★ Full text and examples in reference-stability.md。

5.6 Table of Five Elements (STRUCTURAL PENTAD)

Any structure — rhythmic, rhyming, or musical — has five conventional features. —— Pattison《Lyric Form》p0031

★ Full text and examples in reference-stability.md。

5.7 Three Types of Closure — Three ways of saying "it's finished"

★ Full text and examples in reference-stability.md。

5.8 Five Ways to Create Imbalance (Quick Reference)

Want to	Which variable to move	Method
Push this section into the next section	Number of lines	Add one line / remove one line, making it odd (p0012–p0013)
Speed up within the section	Line length	Make the middle lines shorter (p0015)
Slow down and suspend within the section	Line length	Make one line noticeably longer (p0015, p0021)
Make a certain line memorable	Rhyme	At the position where resolution is expected, close with a sound that has already appeared (deception, p0046, p0068)
After closing, there is still a breath left	Rhyme / number of lines	After closure, repeat one more line (surprise, p0034)

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6. ★ Asymmetry: Why neatness looks like AI

6.0 ★ First, the budget: repetition itself is never the problem

This section discusses asymmetry, butasymmetry does not mean less repetition. These two things are mixed together, and that is the root cause of this library's output being too long and too full.

Measured(Top 100 singers on the Chinese-language singer chart, 4,729 songs, calculated directly by line sequence, unrelated to segmentation labels; rap listed separately):

	Number of main lines (P10 / median / P90)	Share of distinct lines (P10/median/P90)	Structural repetition (P10/median/P90)
Non-rap 3,683 songs	28／42／78	0.46／0.65／0.89	0.11／0.28／0.44
Rap 1,046 songs	—／65／—	—／0.76／—	0.06／0.19／0.32
Output of this library's agent before any budget was added	31–66	0.78–0.94(falls in the top decile of non-rap)	0.20 (28th percentile)
Four songs by this library's author	29–42	0.50–0.83	0.25–0.40 (43rd–83rd percentile)

Number of segment-derived items(computed for the same 4,674-song corpus by segment labels; non-rap 3,631, rap 1,043):

	Non-rap	Rap
Chorus share (P10/median/P90)	0.26／0.48／0.68	0.13／0.34／0.56
Number of chorus repeats	3 times 47%, 2 times 38%, 4 times 5%, 1 time 5%, no identifiable chorus 3%	2 times 44%, 3 times 37%
Songs where every chorus repeat is word-for-word identical	27%	37%
How many lines the last chorus differs from the first by	0 lines 29%, 1–2 lines 15%, median 4 lines	0 lines 40%, median 1 line
Position of the first chorus (as a share of the song's total lines)	Median 0.22, P90 0.36	Median 0.12, one in four songs opens right on the chorus
Has Pre-Chorus/Bridge/Intro/Outro	24%／33%／26%／52%	11%／17%／32%／45%
Number of verse sections	2 sections 71%, 1 section 15%, 3 sections 10%	2 sections 63%
Songs with a whole verse repeated	13%	3%
Most common skeleton	V-C-V-C-O、V-C-V-C、V-C-V-C-C、V-C-V-C-B-C-O、V-C-V-C-C-O	C-V-C-V-C、V-C-V-C-O、V-C-V-C

What we read from it: length is not the problem — median 42 lines, P90 78 lines, and this library's output is within range;the problem is the share of distinct lines, where the output falls in the top decile, i.e. there is almost no repetition. Structural repetition is computed by compression ratio, is unaffected by line splitting, and is the primary metric.

Share of distinct lines in two narrative-style commercial songslowest(0.50, 0.55). The better a song tells a story, the more it repeats, because it hands the chorus over entirely to repetition, and only then do the verses have room to move the story forward.

Three budget rules：

1. Word-for-word chorus repetition is the norm across all genres（→ lw-song-intent §1.2). The first two repeats being identical is not a flaw; that is how listeners memorize the hook. lw-ai-tell-audit Rule 8 targetsevery repeat being identical, with the last repeat neither changing a single word nor adding a tail, not "having repetition," and not "being identical" in itself (27% of songs in the corpus are identical).
2. ★ A small change in the last section is a reliable default, but not the only norm: in the corpus, the last chorus is word-for-word identical to the first in nearly 30%, one or two lines differ in 15%, the rest differ more, with a median difference of 4 lines, mostly becausethe last repeat adds a closing line or extends a section, not because it is rewritten. So there are two paths: copy and change one to three characters, with the changed characters falling on hot spots (start or end of a section); or copy and thenadd a tail. All four lyrics by this library's author use the former approach — the whole song's weight rests on those few characters. It is what asymmetry.chorus_variation should fill in, A full rewrite is a minority, and rewriting means giving up the anticipation built up over the first two repeats.
3. If the share of distinct lines exceeds 0.85, first suspect the budget was not spent(Wrote too much new content), and then doubt the symmetry. This number is only a rough filter; what you write into asymmetry.repetition_budget is how many times you plan to repeat the chorus and what the verses rely on to move forward.
4. ★ The chorus accounts for 25% to 70% of the whole song, with a median near half(non-rap P10 0.26, median 0.48, P90 0.68; rap median 0.34). This is the number where the budget lands: three choruses of 8 lines each is 24 lines, so the whole song should be between 36–60 lines. First decide how many lines and how many repetitions the chorus has, then calculate how many lines are left for the verses. If the chorus proportion is enough but the structural repetition is still low, the problem is in the verses: there should also be reuse between verses (the same sentence pattern with one variable changed, the pre-chorus identical both times), not every section written from scratch.

Two handy ones: in non-rap, the first chorus appears at a median of 22% into the song (P90 36%), which meansthe chorus must come within two verses, and if the first verse plus pre-chorus exceeds one third of the whole song, it is too late; songs with a Pre-Chorus make up only 24%, and those with a Bridge 33%,neither of these two sections is a default configuration, so before writing, first ask whether you need them (→ §2, §3).

The final-run treatment splits three ways (no change 43 / changed words 25 / added tail 21) and the distribution of the opening-breaking line is in reference.md the final section. By era: over forty years songs have gotten longer, the chorus proportion has gotten smaller, repetition has gotten lower, Bridge has gone from 10% to 30%, and the proportions of identical choruses and Pre-Chorus have not moved (same file, final section).

Why you write too much: you do not know there is a budget → you do not dare repeat the chorus either → every section needs new content → you can only rely on new events → the lyrics are long and all story. All the asymmetry discussed after §6.1 is something you doafter the budget is spent.

6.1 Mechanism, not preference

The reason every section having the same number of characters and the chorus being exactly the same all three times feels like a machine is derivable in Pattison's system:

Symptom	What it means structurally	Basis
Every section has the same number of lines and they are all even	Every section closes within itself,no section is pushing forward—the whole lyric only has "stop," no "movement"	Balance stops motion / imbalance produces a sense of forward motion (Lyric Form p0011)
Every line has the same number of characters	★ The pace is constant; you have given up the strongest pace controller	All equal length = PACE CONSTANT (Lyric Form p0016)
Each chorus is identical word for word, and the final run neither changes words nor adds a tail	There is no "surprise closure," no "that one line that surprisingly extra appears,"no position is lit up. ★ The first two runs being the same is normal (§6.0); the problem is only the final run	A surprising extra phrase spotlights two lines (Lyric Form p0013)
The bridge is isomorphic to the verses	From the first line it should not be the same, and isomorphism equals having no bridge	《Lyric Form》p0064

★★ The reverse also holds：Destruction is not the goal. Every imbalance in Pattisonhas a direction—forward motion, spotlight, or contrast (Lyric Form p0011). LYR-SPEC requires that "every asymmetry must have an explainable reason"—that is exactly what this means.

6.2 asymmetry How to fill in the three items

Field	What to fill in	Where it comes from	Self-check
short_line	Which line is deliberately short	§5.3: Short sentences accelerate. ★ Best placedbefore the central passage, letting it push the words into the chorus	Extend this line to the same length as the others, and read it aloud. If it sounds "smoother but weaker," this line is short in the right way
unrhymed	Which passage deliberately does not rhyme	§5.5: Without rhyme there is no resolution point, and the system remains open	Ask: Is the openness here what I want? If this passage is supposed to close (chorus), then it is not asymmetry—it is an omission
chorus_variation	Which word was changed in the third chorus	§2.7: The final chorus makes the recurring object change meaning one last time; §5.2 Use 3: add a line at the end to create surprise	★ The changed word must land in a hotspot position (beginning or end of the passage), otherwise the listener will not notice (《Lyric Form》p0083)

★ Fill in at least two of the three items (LYR-LINT rule 4). When filling in only one item, the easiest to add is chorus_variation—it has the lowest cost and the most direct effect.

6.3 Priority of placement for asymmetry

Even if it is the same "throwing things off balance," placing it in different positions makes a big difference in value:

1. The end of the second verse(highest value)—add a line to push it into the chorus (《Lyric Form》p0013)
2. The final chorus—change a word or add a line so the ending is not the same as the previous two times
3. The entire bridge—it is already supposed to be the most unbalanced passage in the whole lyric (《Lyric Form》p0057)
4. The first verse(lowest value)—★ This should be regular, because it must set the standard for the whole lyric (《Lyric Form》p0053)

⚠ Common pitfall: To pass lint, dumping all the asymmetry into the first verse. That will destroy the frame of reference, and every later "break" will lose its target.

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7. Aligning with song form

7.1 One-to-one correspondence of section ids

LYR-SPEC field	Rule
prosody.sections[].id ＝ lyrics[].section	★ is exactly the section id form[].id（C1、A2, not Chorus names like that), one-to-one correspondence
form[].bars	The number of measures is decided by composition and arrangement; when lyrics come first and music later, this library determines it by character count and sentence pattern (§7.2, §7.4)
form[].name	Section name; when music comes first and lyrics later, follow meta.upstream.form use it, do not change it
prosody.sections[].syllables	One element = one line in the lyric draft = one sentence
prosody.sections[].stress_positions	§5.4: Which characters land on strong beats
prosody.sections[].peak_syllable	★ Which character has the highest note in the whole section

★ form[].id / form[].bars / form[].name is a field shared with the other side of the song: whoever does it first defines it, and the later party only reads it; if you want to change it, write a message（lw-workflow §6.1、§6.2）。

7.2 Two conversions in which structure determines the number of measures

Basis	Conversion
Common Meter ↔ eight measures	A line with four stresses in 4/4 timeis exactly two measures; a four-bar phrase relies onthe rest on the third beat of the fourth barto be defined (Pattison, Lyric Form, p0030). ★ Thereforefour lines of common meter ≈ eight bars, which is the easiest alignment starting point
line length ↔ note density	an increase in unstressed syllables willsqueeze the space, requiring faster and shorter notes; a decrease thenallows longer notes or rests(Lyric Form, p0028). ★ Thereforewith the same number of bars, lengthening the lines inevitably forces out a melody of sixteenth notes

7.3 refrain does not occupy an id

★ the refrain is the last line or two of the verse, not an independent section（《Lyric Form》p0061）—— do not give it a separate form[].id, otherwise the arrangement will treat it as an independent section to orchestrate.

7.4 lyrics first, then music: reverse constraints

when writing lyrics first and music after, the output of this skill is what gets handed to the composer and arranger:

what to give out	purpose
the number of lines in each section and the number of characters in each line	set form[].bars
the five-element table for each section (§5.6)	tell the composer and arrangerwhether this section pushes or stops, corresponding to the energy direction of the arrangement
the rhythm of the hook (§4.4, item 5)	★ decide it first, then write the rest—it will be reused elsewhere as a motif

⚠ when writing lyrics first and music after, the lyrics are easier to write in a neat and uniform way, because there are no external constraints—the asymmetry of §6 must be applied more forcefully.

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8. must-pass upon completion

• each section is marked with → (push) or ■ (stop), there are no two consecutive ■, and it is not all → (§1.1)
• the first verse is the most regular section of the whole lyric, you can state its number of lines, how many characters per line, and its rhyme scheme (§2.2)
• the chorus is the most balanced section, and it has "stopped"（§2.4）
• ★ the bridge differs from the verse from its first line（§2.5）
• transitional bridgeshorter than the verse or more urgent than the verse, not a continuation of the verse (§2.3)
• counted the number of Song Systems, and the hook appears at least once in each of them (§3.1, §4.3)
• the title falls onhotspot positions(section start / section end / deceptive position / surprise position) (§4.2)
• ★ the rhythm of the hook was decided before starting to write（§4.4）
• list each line of each section'scharacter count as a string of numbersand looked through it,it is not a string of identical numbers（§5.3）
• each section has filled inthe five-element table（§5.6）
• what is placed in the spotlight-lit position iswhat you most want people to remember（§5.7）
• asymmetry at least two items are filled in, anda reason can be given for each one（§6.2）
• asymmetryis not all dumped into the first verse（§6.3）
• section id and form[].id correspond one-to-one；refrain there is nooccupying an id on its own (§7.1, §7.3)

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Appendix: Sources

• Main text: Pat Pattison, *Songwriting: Essential Guide to Lyric Form and Structure* (referred to in this document as *Lyric Form*), cited pages p0004–p0092. The four variables, the five-element table, the three types of closure, central/development sections, the Song System, and the five hook strategies in this skill all come from this book.
• ⚠ The book itself states that it deals only with structure: the author points out in the afterword that how to find rhymes and how to brainstorm content belong to other books (p0093)— in this library they correspond to lw-rhyme and lw-imagery。
• the Chinese conversion notes at the end of §5.4 and §4.4are correspondences made by this skill based on the actual situation of Mandarin, while the original book was written according to the English stress system.