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docs(decisions): record audio discussion outcomes D-067 through D-074

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Recognition chime timing (D-067), 5-bus audio architecture (D-068),
audio dip profiles (D-069), confrontation as cognitive vulnerability
(D-070), monologue chime placeholder strategy (D-071), universal
conversation murmur (D-072), zone crossfade (D-073), hybrid audio
generation (D-074). Amends D-038 scope, resolves Q-014.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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jpmschweitzer
2026-02-16 01:03:02 +01:00
co-authored by Claude Opus 4.6
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decisions/scope.md
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@@ -114,8 +114,11 @@ What we're building: game concept, design pillars, prototype definition, map spe
7. `sfx_monologue_chime.ogg` — soft crystalline tone, "neural lattice firing" feel (0.5-1.0s, monologue appearance)
8. `sfx_monologue_chime_urgent.ogg` — sharper variant for contradiction/anomaly observations (0.5-1.0s)
- **Architecture:** Event-driven with asset registry + visual fallback. Simulation emits typed sound events; client renders as audio (if asset exists) or visual indicator + monologue trigger (if not). Ambient loops managed separately from event-driven sounds. Monologue chime is a UI sound, not a simulation sound.
- **Cross-reference:** Three-range sound model ([D-018](perception.md#d-018-three-range-sound-model)), sound event architecture (Gestalt R2 section 6)
- **Raised by:** Ozzie (Round 1 minimum viable proposal, Round 2 full spec), project lead (confirmed, directives #3 and #9)
- **Amendment (2026-02-16, Audio Pipeline Kickoff):**
- **Hybrid audio generation approach:** Stable Audio Open (SAO) for sounds >200ms with organic character (footsteps, ambient layers). Manual synthesis for sounds <200ms with precise/digital character (UI clicks, scanner beeps). SAO ceiling ~47s; accept 45s loops with crossfade for ambient layers. The insert-tech/organic split ([D-074](content.md#d-074-audio-aesthetic-identity--insert-tech-vs-organic)) maps to synthesis/generation split.
- **Sprint 7 scope expansion:** Ticket #440 expanded from 6 to 8 assets, adding monologue chimes (assets 7-8) as deliberate placeholders with Sprint 8 redo mandate. Chimes are critical for [D-067](perception.md#d-067-recognition-chime-fires-at-onset-of-cognitive-delay) cognitive delay feel but acknowledged as difficult to generate correctly — manual synthesis required for production quality.
- **Cross-reference:** Three-range sound model ([D-018](perception.md#d-018-three-range-sound-model)), sound event architecture (Gestalt R2 section 6), audio aesthetic ([D-074](content.md#d-074-audio-aesthetic-identity--insert-tech-vs-organic)), recognition chime ([D-067](perception.md#d-067-recognition-chime-fires-at-onset-of-cognitive-delay))
- **Raised by:** Ozzie (Round 1 minimum viable proposal, Round 2 full spec), project lead (confirmed, directives #3 and #9). Amendment raised by Inigo (hybrid approach), endorsed by Tyre.
- **Dissent:** Mellanie and Araminta both proposed deferring audio; project lead overruled. Visual sound indicators remain complementary to audio (not replacement).
### D-039: v0.1 wow moment scope — all 6 moments