audio-score-design

name	audio-score-design
description	Use when designing audio, music, sound effects, or voice/dialogue for video storyboards, AI video generation pipelines, film scoring, or any project requiring per-shot synchronized sound design with three layers (score, SFX, voice). Triggers include "audio design", "film score", "sound design", "voice acting", "BGM", "soundtrack", "配乐", "音效", "配音", "声音设计".
metadata	{"version":"1.0","author":"tecx"}

Audio Score Design

Three-layer audio design methodology for video storyboard pipelines. Every shot gets synchronized score, SFX, and voice — anchored to real film scores, physical parameters, and emotion tension values.

When to Use

• Designing audio for storyboard shots (any genre/culture)
• Writing audio field descriptions for AI video generation prompts
• Choosing reference film scores for a scene's emotional tone
• Parameterizing voice/dialogue delivery for TTS or voice direction
• Fixing audio-visual desync in generated video

Core Rule: One Composer Per Shot

Select exactly ONE reference work per shot. Match via: scene emotion tension (0-10) → tension dimension in references/emotion-tension-map.md → pick ONE composer whose sound DNA fits the cultural context.

Do NOT stack 2-3 composers. One precise reference > three vague ones.

Three-Layer Template

audio: {
  score: "ref:{Composer}/{Work} → {instruments}, {dynamics}(pp-ff), {tempo}bpm, tension:{0-10}",
  sfx: "{material}+{action}+{freq Hz}+{decay s}+{spatial L/C/R, distance m}",
  voice: "{character}:'{line}' → pitch:{Hz}, breathiness:{%}, rate:{chars/s}, {physical}, reverb RT60:{s}"
}

Audio-Action Sync Formulas

score_bpm = body_motion_frequency_Hz × 60
volume_dB = tension × 6 - 40        (tension 0 = -40dB floor, 10 = +20dB peak)
pitch_shift = tension_delta × 50 cents
breath_interval_ms = 2000 / tension  (tension 5 = 400ms, 10 = 200ms)

Five-Phase Rhythm Arc

Phase	Name	Tension	Audio Behavior
1	Establish	1-3	Ambient + single instrument, pp
2	Build	3-5	Rhythm pattern enters, layers add, mp→mf
3	Focus	5-7	Detail SFX amplified, space narrows
4	Peak	8-9	All layers stacked, ff, rhythm max
5	Resolve	fallback	Layers exit, return to ambient, pp

Map your shot sequence onto this arc. Not every scene uses all 5 phases.

Voice Parameterization

Dimension	Parameter	Range
Pitch	Fundamental freq	Male 100-180Hz / Female 180-350Hz / Child 300-500Hz
Texture	Descriptor	sandpaper / velvet / crystal / metallic / hollow
Breathiness	Air ratio	0% pure phonation → 100% pure breath
Dynamics	Force	pp whisper → mp conversation → mf declaration → f shout → ff scream
Emotion externalization	Physical only	vocal tremor Hz / pitch drift cents / breath gap ms

Do NOT use emotion adjectives (sexy/angry/sad). Use physical parameters.

Audio Dodge (D7 Extension)

Forbidden	Safe Replacement
moaning/groaning	vocal tremor / breath acceleration
screaming	frequency spike >3kHz / vocal overload
panting/gasping	breath rate increase to 40bpm
celebrity voice imitation	physical parameters (pitch+texture+breathiness)

audio.sfx and audio.score do NOT need dodge — instrument/foley terms are safe.

Quick Reference

See references/emotion-tension-map.md for the full 9-dimension tension → composer lookup.

See references/composer-reference-library.md for 45+ works across 30+ composers.

See references/instrument-palettes.md for cultural instrument groups.

Common Mistakes

Mistake	Fix
Stacking 2-3 composers per shot	Pick ONE. Match tension dimension + cultural context.
Using emotion words for voice	Replace with Hz/bpm/%/cents physical params
Ignoring sync formula	bpm must = motion_freq × 60 ± 10%
Same composer across all shots	Each shot picks independently from tension map
No five-phase arc consideration	Map shots to establish→build→focus→peak→resolve
Audio volume unrelated to tension	Use formula: dB = tension × 6 - 40