Momento/.agents/skills/suno-lyric-transformer/references/section-jobs.md

Section Job Framework

Last validated: March 2026. Section job definitions are songwriting craft principles, not Suno-specific — they do not require re-validation with Suno updates.

Every song section has a specific job in the emotional arc. Understanding these jobs is critical for deciding where to place lyrics and how to structure a poem-to-song transformation.

Section Roles

Section	Job	Emotional Function	Typical Lines
Intro	Set the stage	Create atmosphere, establish mood before words	0-4 (often instrumental)
Verse	Setup / Tell the story	Deliver narrative, build context, paint scenes	4-8
Pre-Chorus	Lift / Create tension	Transitional energy rise, prepare for payoff	2-4
Chorus	Payoff / Emotional anchor	Deliver the hook, the core feeling, the thing that sticks	2-6
Bridge	Something NEW / Contrast	New chords, new melody, new perspective. Introduces harmonic content the song hasn't heard yet	2-6
Breakdown	Something LESS / Strip back	Subtractive — strips instruments to spotlight vocals or a motif. In metal, forces tempo drop and heavy rhythm. Creates maximum contrast before high-energy sections	2-4
Build-Up	Escalate / Rising tension	Increasing energy leading to climax	2-4
Outro	Resolve / Close	Bring it home — resolution, fade, final statement	2-6

Transformation Decision Guide

When converting raw text to song structure, ask these questions:

"Where's the hook?"

• The most emotionally resonant, imagistic, or rhythmic line(s)
• This becomes the chorus or chorus seed
• If no obvious hook exists, derive one from the poem's central image or feeling

"Where's the turn?"

• The moment the perspective shifts, deepens, or surprises
• This becomes the bridge
• Poems without a turn may need a bridge written to provide contrast

"What's the story arc?"

• Lines that set scenes or provide context → verses
• Lines that build tension → pre-chorus
• Lines that release/resolve → chorus or outro

"What should repeat?"

• Repetition = emphasis = memorability
• The chorus repeats. What phrase deserves to be heard 3+ times?
• Consider also: anaphora (repeated line openings), callbacks (later sections echoing earlier phrases)

Common Poem-to-Song Structures

Short Poem (8-16 lines)

Verse 1 (first half of poem)
Chorus (derived from emotional core)
Verse 2 (second half of poem)
Chorus

Song Duration — Let the Words Decide

Not all songs need to be 3-4 minutes. A short duration (e.g., 1:49) can be a feature when it matches the emotional content. Don't pad short poems just for runtime — let the song be the length the words demand. Short tracks create contrast in a playlist between longer epic tracks and short punches. A 90-second song that lands every line hits harder than a 3-minute song with filler.

Very Short Poem (under 15 lines)

Poems under 15 lines need special handling — Suno fills short content with looping instrumental, producing a song that feels empty or aimless. Strategies:

Double delivery: Deliver the poem twice with different energy. Clean/quiet first pass, then heavy/intense second pass. The repetition is intentional — the same words change meaning through musical recontextualization. This works when the poem's meaning deepens or shifts under a different emotional lens.

Verse 1 (full poem, clean delivery)
Chorus (extracted hook)
Verse 2 (full poem, heavy delivery)
Final Chorus

Chorus extraction: Pull the poem's strongest, most repeatable lines into a standalone chorus. This gives Suno enough structural repetition to build a full song around limited source text.

Thesis isolation: Build through the poem, add a guitar solo or instrumental break, then deliver ONLY the final thesis statement as its own section. Powerful when the poem has a clear thesis line that deserves to land in isolation.

Verse 1
Verse 2
Guitar Solo
Outro (thesis line only)
[End]

What NOT to do: Do not pad short poems with [Instrumental break] tags in the lyrics — this literally asks Suno to noodle and produces a song that is mostly instrumental filler.

Medium Poem (16-30 lines)

Verse 1
Pre-Chorus
Chorus
Verse 2
Pre-Chorus
Chorus
Bridge (the "turn" or a new perspective)
Final Chorus

Long Poem (30+ lines)

Verse 1
Chorus
Verse 2
Chorus
Bridge
Verse 3 (or shortened recap)
Final Chorus
Outro

Poem That Doesn't Need a Chorus

Some poems are genuinely better as continuous narrative. Signs:

• The poem is a single sustained meditation with no natural hook
• Adding repetition would break the flow
• The emotional power is in the progression, not a single moment

In this case, structure as:

Verse 1
Verse 2
Bridge
Verse 3
Outro
[End]

Use descriptor metatags to guide energy changes instead of relying on chorus repetition.

Through-Composed Structure — Production Notes

Through-composed (no repeating chorus) works well when:

• The poem has a clear arc: building tension, climax, resolution.
• Word density naturally drives dynamic shifts — dense lines for intensity, sparse lines for breathing room.
• The style prompt supports the dynamic range needed (e.g., a style prompt that includes both quiet and heavy descriptors).

Critical requirement: always place a hard [End] tag after the final delivery to prevent Suno from looping or generating trailing instrumental. Without [End], through-composed songs are especially prone to meandering because Suno has no chorus to signal "this is the structure repeating."

Structural Metaphor in Song Design

Different time signatures for different section types can serve as a form-serves-content technique — the musical structure itself becomes a storytelling device. When a poem's themes lend themselves to it, the Lyric Transformer should consider suggesting structural metaphors where the musical form embodies the lyrical meaning.

Examples

Lyrical Theme	Musical Treatment	Effect
Chaos, instability, disorientation	Odd time signatures (5/4, 7/8) in verses	The listener feels off-balance, mirroring the content
Resolution, arrival, clarity	Straight 4/4 in choruses	Landing on solid ground after rhythmic instability
Freedom, looseness	NOLA funk groove, swung rhythms	The music breathes and moves freely
Confinement, rigidity, control	Rigid tempo, pounding metronomic drums	Mechanical precision creates a trapped feeling
Building dread	Accelerating tempo or increasing rhythmic density	Tension ratchets up through the music itself

Application Guidance

This technique is most powerful for prog and through-composed structures where the musical journey parallels the lyrical journey. The Lyric Transformer should flag opportunities for structural metaphor when:

• The poem has contrasting emotional states across sections (e.g., turmoil in verses, peace in choruses)
• The poem's themes include concepts that have natural musical analogs (freedom/confinement, chaos/order, tension/release)
• The target genre supports rhythmic experimentation (prog, post-metal, NOLA funk — less applicable to straightforward rock/pop)

Note: Time signature changes are inconsistently respected by Suno (see metatag-reference.md experimental tags), so structural metaphor should be treated as aspirational — worth attempting for the payoff when it lands, but not something to depend on for the song to work.