{
  "xzbt": "0.1",
  "meta": {
    "id": "exhibit-a",
    "name": "Exhibit A — Procedural Machine",
    "version": "0.1.0",
    "description": "Procedural audiovisual reference with cadence and a temporary scenario override; final acceptance remains Phase 9."
  },
  "runtime": {
    "seed": 42
  },
  "visuals": {
    "scene": {
      "coordinateSpace": "virtual",
      "width": 960,
      "height": 540,
      "background": "#101d25"
    },
    "systems": {
      "wheel": {
        "type": "graphic",
        "content": {
          "outer": {
            "type": "ring",
            "position": {
              "x": 480,
              "y": 270
            },
            "radius": 160,
            "innerRadius": 158,
            "style": {
              "fill": "#72c4bd"
            }
          },
          "inner": {
            "type": "ring",
            "position": {
              "x": 480,
              "y": 270
            },
            "radius": 125,
            "innerRadius": 123,
            "style": {
              "fill": "#e1bd7c"
            }
          },
          "hub": {
            "type": "ring",
            "position": {
              "x": 480,
              "y": 270
            },
            "radius": 38,
            "innerRadius": 36,
            "style": {
              "fill": "#e1bd7c"
            }
          }
        }
      },
      "spokes": {
        "type": "repeater",
        "count": 12,
        "distribution": {
          "type": "point",
          "position": {
            "x": 480,
            "y": 270
          }
        },
        "repeat": {
          "type": "group",
          "transform": {
            "rotation": {
              "op": "multiply",
              "args": [
                {
                  "ref": "repeat.fraction"
                },
                330
              ]
            }
          },
          "behaviors": [
            {
              "type": "rotate",
              "speed": 12
            }
          ],
          "children": {
            "bar": {
              "type": "rectangle",
              "position": {
                "x": 40,
                "y": -4
              },
              "size": {
                "width": 85,
                "height": 8
              },
              "style": {
                "fill": "#e1bd7c"
              }
            }
          }
        }
      }
    }
  },
  "parameters": {
    "activity": {
      "type": "number",
      "default": 0.4,
      "min": 0,
      "max": 1,
      "label": "Activity"
    }
  },
  "bindings": [
    {
      "source": "parameters.activity",
      "target": "visuals.camera.zoom",
      "scale": 0.25,
      "offset": 1
    }
  ],
  "cadence": {
    "intensity": {
      "ref": "parameters.activity"
    }
  },
  "audio": {
    "buses": {
      "ambient": {
        "gain": 0.5
      },
      "effects": {
        "gain": 0.5
      }
    }
  },
  "sounds": {
    "bed": {
      "name": "Distant hum",
      "bus": "ambient",
      "usage": [
        "automatic"
      ],
      "cadence": {
        "class": "ambient"
      },
      "recipe": {
        "mode": "continuous",
        "release": "1s",
        "nodes": {
          "tone": {
            "type": "oscillator",
            "frequency": 55
          },
          "trim": {
            "type": "gain",
            "gain": 0.04
          }
        },
        "routes": [
          {
            "from": "tone",
            "to": "trim"
          },
          {
            "from": "trim",
            "to": "output"
          }
        ]
      }
    },
    "drone": {
      "name": "Passing resonance",
      "bus": "ambient",
      "usage": [
        "scenario"
      ],
      "recipe": {
        "mode": "continuous",
        "release": "2s",
        "nodes": {
          "tone": {
            "type": "oscillator",
            "frequency": 165
          },
          "trim": {
            "type": "gain",
            "gain": 0.035
          }
        },
        "routes": [
          {
            "from": "tone",
            "to": "trim"
          },
          {
            "from": "trim",
            "to": "output"
          }
        ]
      }
    },
    "beat": {
      "name": "Soft impulse",
      "bus": "effects",
      "usage": [
        "automatic",
        "scenario",
        "manual"
      ],
      "cadence": {
        "class": "routine",
        "overlap": false,
        "cooldown": "3s"
      },
      "recipe": {
        "mode": "oneshot",
        "release": "50ms",
        "nodes": {
          "hit": {
            "type": "impulse",
            "duration": "8ms",
            "amplitude": 0.06
          }
        },
        "routes": [
          {
            "from": "hit",
            "to": "output"
          }
        ]
      }
    }
  },
  "scenarios": {
    "disturbance": {
      "name": "Temporary disturbance",
      "trigger": {
        "type": "random-interval",
        "min": "30s",
        "max": "90s"
      },
      "duration": "12s",
      "cooldown": "20s",
      "priority": 70,
      "onStart": [
        {
          "type": "override",
          "target": "parameters.activity",
          "value": 0.95,
          "scope": "scenario",
          "transition": {
            "in": "1s",
            "out": "2s",
            "easing": "ease-in-out"
          }
        },
        {
          "type": "sound",
          "sound": "drone"
        }
      ],
      "timeline": []
    }
  }
}