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SA#27Ratified 2026-05-21 · B3001-B3015

Rock Lyric System

At rock altitude, the vowel must yield to the pitch.

The first arc to ground a Sacred Accident in measurable formant physics. Above ~G4 chest voice, F0 collides with the structural formant of closed vowels — the singer reshapes mid-note, breaking the chorus payoff. The Vowel-Pitch Integrity primitive flags closed-vowel cliffs at chorus peaks. 5 substyles span classic-rock-radio → roots-heartland, each with its own VPI ceiling.

5 substyles7 primitives30 hit anchors10 banned modes

Try It — 87 starter prompts

Browse all 87

Each prompt is hand-tuned to exercise the rock load-bearing axis. Click to start with the prompt pre-loaded into the forge.

Featuredsubstyle: classic-rock-radio· exercises open-vowel sustain, pitch-driven melody shape

Highway Overpass at 3 AM

A driver passes under sodium lights, watching tail-lights blur into infinity. The radio crackles between stations—nothing holds. Write a song about the particular loneliness of motion without destination.

87 prompts in the rock catalog · Shuffle rotates the featured + 3 alternates together

Substyles · 5

Each substyle binds its own audit thresholds, craft paradigm, POV mode, and banned failure modes. The forge auto-detects the right substyle from your prompt and genre tag.

Craft paradigms:title-firstriff-firstacoustic-physics-firstliterary-philosophical-first

Rock Radio

Top admin-published rock songs from the corpus, with audio + extracted standout lines.

Load-bearing primitive

VPI

VPIClosed-vowel-on-chorus-peak collision rate (SA#27 axis)

The primitive that mechanically operationalizes SA#27. Every rock lyric the forge produces is gated by this measurement.

Audit primitives · 6 deterministic + 1 Haiku-judged

Each runs against every rock lyric the forge produces; the load-bearing primitive is highlighted.

CodeNameRoleType
VPIVowel-Pitch IntegrityClosed-vowel-on-chorus-peak collision rate (SA#27 axis)DeterministicSA axis
RVLRegister-Vowel LandingChorus-wide open-vowel disciplineDeterministic
TTITitle-Tension IndexDesmond Child/Mutt Lange title-tension scoringDeterministic
RHCRhythmic Hook ContrastChorus rhythmically compressed vs verseDeterministic
CWMConcreteness Word MetricSpringsteen/Petty concreteness floorDeterministic
GDDGap Design DensityStadium response space (instrumental + short anthemic lines)Deterministic
SPTStadium Participation TestHaiku-judged 50,000-person-singalong testHaiku

Forbidden Archive · 10 failure modes

Each failure mode is cited by name in the forge prompt and flagged by the critic loop with section + reasoning. The full operational definitions live in the Forbidden Archive document.

Closed-Vowel Cliff

Flagged by the rock critic loop by canonical name. A song carrying this mode caps at B+ on the SA axis regardless of its 12-metric quality score. Operational definition catalogued in the rock Forbidden Archive — full text shipping in a follow-up build.

Greedy Spot On Peak

Flagged by the rock critic loop by canonical name. A song carrying this mode caps at B+ on the SA axis regardless of its 12-metric quality score. Operational definition catalogued in the rock Forbidden Archive — full text shipping in a follow-up build.

Tension-Less Title

Flagged by the rock critic loop by canonical name. A song carrying this mode caps at B+ on the SA axis regardless of its 12-metric quality score. Operational definition catalogued in the rock Forbidden Archive — full text shipping in a follow-up build.

Hook Shadowing

Flagged by the rock critic loop by canonical name. A song carrying this mode caps at B+ on the SA axis regardless of its 12-metric quality score. Operational definition catalogued in the rock Forbidden Archive — full text shipping in a follow-up build.

Vocal Lift Absence

Flagged by the rock critic loop by canonical name. A song carrying this mode caps at B+ on the SA axis regardless of its 12-metric quality score. Operational definition catalogued in the rock Forbidden Archive — full text shipping in a follow-up build.

Chant Gap Absence

Flagged by the rock critic loop by canonical name. A song carrying this mode caps at B+ on the SA axis regardless of its 12-metric quality score. Operational definition catalogued in the rock Forbidden Archive — full text shipping in a follow-up build.

Concept Drift

Flagged by the rock critic loop by canonical name. A song carrying this mode caps at B+ on the SA axis regardless of its 12-metric quality score. Operational definition catalogued in the rock Forbidden Archive — full text shipping in a follow-up build.

Repetition Bloat

Flagged by the rock critic loop by canonical name. A song carrying this mode caps at B+ on the SA axis regardless of its 12-metric quality score. Operational definition catalogued in the rock Forbidden Archive — full text shipping in a follow-up build.

Power-Ballad Mismatch

Flagged by the rock critic loop by canonical name. A song carrying this mode caps at B+ on the SA axis regardless of its 12-metric quality score. Operational definition catalogued in the rock Forbidden Archive — full text shipping in a follow-up build.

Authenticity Cosplay

Flagged by the rock critic loop by canonical name. A song carrying this mode caps at B+ on the SA axis regardless of its 12-metric quality score. Operational definition catalogued in the rock Forbidden Archive — full text shipping in a follow-up build.

Calibrated against 30 verified hits

The audit primitives are calibrated so canonical rock hits score at the S+/S band. Sources include the Rolling Stone 500, Rock Hall of Fame, Grammy Hall of Fame, Library of Congress National Recording Registry, and substyle-specific canonical playlists.

Corpus license: CC BY 4.0. Lyrics not reproduced — title + artist + year + structural metadata only.

Forge a rock song

The forge applies the rock substyle profile, banned failure modes, and VPI as a pre-output gate. Output isn’t generic AI lyrics — it’s rock lyrics that pass the audit your genre demands.