{
  "schemaVersion": 3,
  "cityId": "venice-berkeley",
  "seed": "venice-berkeley-common-chord-01",
  "title": "Tide Tables and Open Porches",
  "sourceWorld": {
    "worldId": "venice-berkeley",
    "hook": "A tidal university town where timber porches become public loggias and the bell tower becomes an assembly room.",
    "story": "Water collectors, cooperatives and workshops share a narrow pedestrian city between lagoon and wooded foothills; the music follows a repeated civic phrase as it travels from open air into a lively market."
  },
  "intent": {
    "oneLine": "A spacious lagoon melody becomes a gently syncopated timber-and-bell conversation in the city.",
    "keywords": [
      "six-eight harbor lilt",
      "collective call and response",
      "dry timber taps",
      "copper bell punctuation",
      "breathing room"
    ],
    "avoid": [
      "generic fantasy drone",
      "wall-to-wall arpeggios",
      "bombastic orchestral swells",
      "random urban beats",
      "literal unprovided boat or crowd recordings"
    ]
  },
  "musicalIdentity": {
    "bpm": 78,
    "swing": 0.04,
    "rootMidi": 38,
    "scale": "mixolydian",
    "signatureMotif": [
      0,
      2,
      4,
      3,
      1
    ],
    "progression": [
      0,
      5,
      3,
      0
    ],
    "phraseBars": 8
  },
  "worldFingerprint": {
    "meter": "6/8",
    "timingBehavior": "tidal",
    "material": "stone-water",
    "spatialShape": "moving-harbour",
    "arrangementBehavior": "call-response",
    "register": "mid",
    "silence": 0.3
  },
  "samplePalette": [
    {
      "material": "wood",
      "intensities": [
        "light"
      ]
    },
    {
      "material": "plank",
      "intensities": [
        "medium"
      ]
    },
    {
      "material": "bell",
      "intensities": [
        "heavy"
      ]
    },
    {
      "material": "glass",
      "intensities": [
        "light"
      ]
    }
  ],
  "soundEffects": {
    "building.place": {
      "label": "Seat the timber joint",
      "description": "A light wood impact under the engine’s placement gesture gives construction a close, tactile confirmation.",
      "sample": {
        "material": "wood",
        "intensity": "light"
      },
      "gain": 0.56
    },
    "building.remove": {
      "label": "Lift the porch board",
      "description": "A medium plank impact accompanies the removal gesture, distinct from the lighter placement click.",
      "sample": {
        "material": "plank",
        "intensity": "medium"
      },
      "gain": 0.42
    },
    "placement.invalid": {
      "label": "A quiet glass check",
      "description": "A soft glass impact accompanies the universal invalid-placement gesture without competing with successful construction.",
      "sample": {
        "material": "glass",
        "intensity": "light"
      },
      "gain": 0.14
    }
  },
  "spatialMix": {
    "nature": {
      "label": "Beyond the landing",
      "description": "The five-note motif unfolds over two bars in glass tones above occasional soft haze chords and an airy texture; large gaps suggest fog and the open lagoon.",
      "keywords": [
        "spacious",
        "glass reflections",
        "open air"
      ],
      "lead": "glass",
      "bass": "round",
      "pad": "haze",
      "drums": "dust",
      "texture": "air",
      "brightness": 0.43,
      "space": 0.77,
      "grit": 0.05,
      "density": 0.22
    },
    "city": {
      "label": "Under the shared loggia",
      "description": "Bell calls and answering phrases sit above a rounded bass in six-eight, with dry wood taps, restrained organ harmony and rare recorded bell punctuation; a 32-bar form grows, converses and thins again.",
      "keywords": [
        "timber pulse",
        "public bells",
        "bookshop warmth"
      ],
      "lead": "bell",
      "bass": "round",
      "pad": "organ",
      "drums": "dust",
      "texture": "none",
      "brightness": 0.52,
      "space": 0.36,
      "grit": 0.16,
      "density": 0.48
    },
    "transition": {
      "curve": "equal-power",
      "description": "Both arrangements share the same harmony, five-note motif and bar clock, so movement between the lagoon and city continuously trades spacious glass phrases for timber rhythm without restarting the music."
    }
  }
}