- web/js/world/audio.js: one AudioContext unlocked on first gesture; day/night ambience crossfade, rain (weather.intensity), footsteps, shop-door music spill (nearest open music-shop, distance-gain), tram rumble+bell, enterShop SFX. Consumes Lane E manifest.audio (3x retry). Self-ticks off window.PROCITY.
- House audio law verified live: silent pre-gesture (0 fetches), ?mute=1 silent surface (0 fetches), ?noassets=1 zero audio/manifest fetches, lazy-load (8.7MB<=25MB), no per-frame alloc.
- window.PROCITY.audio for Lane F: playInterior({musicKey,toneKey})/stopInterior (street beds duck while inside), playSfx, setMasterGain, mute, state diag. Confirms Lane C room.audio={musicKey,toneKey} contract.
- Small guarded [Lane B R11 audio] loader in index.html.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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