{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://xzbt.org/schemas/0.1/exhibit.json",
  "title": "XZBT Exhibit Schema 0.1",
  "description": "Authoritative structural schema for XZBT 0.1 declarative exhibits.",
  "type": "object",
  "required": [
    "xzbt",
    "meta"
  ],
  "additionalProperties": false,
  "properties": {
    "xzbt": {
      "type": "string",
      "const": "0.1",
      "description": "XZBT format specification version. Must be '0.1'."
    },
    "meta": {
      "type": "object",
      "description": "Exhibit metadata and descriptive properties.",
      "required": [
        "id",
        "name"
      ],
      "additionalProperties": false,
      "properties": {
        "id": {
          "type": "string",
          "pattern": "^[a-z][a-z0-9_-]*$",
          "maxLength": 64,
          "description": "Unique exhibit identifier."
        },
        "name": {
          "type": "string",
          "minLength": 1,
          "maxLength": 128,
          "description": "Human-readable exhibit title."
        },
        "version": {
          "type": "string",
          "description": "Exhibit author semantic version string."
        },
        "author": {
          "type": "string",
          "maxLength": 128,
          "description": "Author or entity attribution."
        },
        "description": {
          "type": "string",
          "maxLength": 1024,
          "description": "Short description of exhibit behavior and theme."
        },
        "license": {
          "type": "string",
          "description": "License or rights attribution."
        },
        "tags": {
          "type": "array",
          "maxItems": 16,
          "items": {
            "type": "string",
            "maxLength": 32
          }
        }
      }
    },
    "runtime": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "seed": {
          "oneOf": [
            {
              "type": "integer"
            },
            {
              "type": "string",
              "const": "random"
            }
          ],
          "description": "PRNG seed: integer for deterministic reproduction, or 'random'."
        }
      }
    },
    "parameters": {
      "type": "object",
      "description": "User-tunable exhibit parameters.",
      "patternProperties": {
        "^[a-z][a-z0-9_-]*$": {
          "$ref": "#/definitions/ParameterSpec"
        }
      },
      "additionalProperties": false
    },
    "state": {
      "type": "object",
      "description": "Simulation-owned runtime state variables.",
      "patternProperties": {
        "^[a-z][a-z0-9_-]*$": {
          "$ref": "#/definitions/StateSpec"
        }
      },
      "additionalProperties": false
    },
    "signals": {
      "type": "object",
      "description": "Read-only environmental and input signals.",
      "patternProperties": {
        "^[a-z][a-z0-9_-]*$": {
          "type": "object"
        }
      },
      "additionalProperties": false
    },
    "ui": {
      "type": "object",
      "description": "Generated UI grouping and presentation preferences.",
      "additionalProperties": true
    },
    "components": {
      "type": "object",
      "description": "Modular audio and visual reusable components.",
      "additionalProperties": false,
      "properties": {
        "audio": {
          "type": "object",
          "propertyNames": {
            "pattern": "^[a-z][a-z0-9_-]*$"
          },
          "additionalProperties": {
            "$ref": "#/definitions/AudioComponent"
          }
        },
        "visual": {
          "type": "object"
        }
      }
    },
    "visuals": {
      "type": "object",
      "description": "Procedural rendering systems, canvas, and cameras.",
      "additionalProperties": false,
      "properties": {
        "camera": {
          "type": "object"
        },
        "systems": {
          "type": "object"
        },
        "passes": {
          "type": "array"
        }
      }
    },
    "audio": {
      "type": "object",
      "description": "Synthesizer graphs, buses, and routing.",
      "additionalProperties": false,
      "properties": {
        "buses": {
          "type": "object",
          "propertyNames": {
            "pattern": "^[a-z][a-z0-9_-]*$",
            "not": {
              "const": "master"
            }
          },
          "additionalProperties": {
            "$ref": "#/definitions/AudioBus"
          }
        },
        "recipes": {
          "type": "object",
          "propertyNames": {
            "pattern": "^[a-z][a-z0-9_-]*$"
          },
          "additionalProperties": {
            "$ref": "#/definitions/AudioRecipe"
          }
        }
      }
    },
    "sounds": {
      "type": "object",
      "description": "Sound definitions separating metadata from synthesis.",
      "propertyNames": {
        "pattern": "^[a-z][a-z0-9_-]*$"
      },
      "additionalProperties": {
        "$ref": "#/definitions/Sound"
      }
    },
    "cadence": {
      "type": "object",
      "description": "Procedural rhythm clocks and pulse pools.",
      "additionalProperties": false,
      "properties": {
        "clocks": {
          "type": "object"
        },
        "pools": {
          "type": "object"
        }
      }
    },
    "modulators": {
      "type": "object",
      "description": "Continuous LFOs, noise generators, and sample-and-hold signals.",
      "patternProperties": {
        "^[a-z][a-z0-9_-]*$": {
          "type": "object"
        }
      },
      "additionalProperties": false
    },
    "bindings": {
      "type": "array",
      "description": "Directed value propagation links.",
      "items": {
        "$ref": "#/definitions/BindingSpec"
      }
    },
    "events": {
      "type": "object",
      "description": "Discrete lifecycle and state change event triggers.",
      "patternProperties": {
        "^[a-z][a-z0-9_-]*$": {
          "type": "object"
        }
      },
      "additionalProperties": false
    },
    "scenarios": {
      "type": "object",
      "description": "Autonomous orchestrated scenarios and timelines.",
      "patternProperties": {
        "^[a-z][a-z0-9_-]*$": {
          "type": "object"
        }
      },
      "additionalProperties": false
    }
  },
  "definitions": {
    "ParameterSpec": {
      "type": "object",
      "required": [
        "type",
        "default"
      ],
      "additionalProperties": false,
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "number",
            "integer",
            "boolean",
            "string",
            "color",
            "enum"
          ]
        },
        "default": {},
        "min": {
          "type": "number"
        },
        "max": {
          "type": "number"
        },
        "step": {
          "type": "number",
          "exclusiveMinimum": 0
        },
        "values": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "label": {
          "type": "string",
          "maxLength": 128
        },
        "unit": {
          "type": "string",
          "maxLength": 16
        }
      }
    },
    "StateSpec": {
      "type": "object",
      "required": [
        "type",
        "initial"
      ],
      "additionalProperties": false,
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "number",
            "integer",
            "boolean",
            "string"
          ]
        },
        "initial": {},
        "min": {
          "type": "number"
        },
        "max": {
          "type": "number"
        }
      }
    },
    "BindingSpec": {
      "type": "object",
      "required": [
        "source",
        "target"
      ],
      "additionalProperties": false,
      "properties": {
        "source": {
          "type": "string",
          "description": "Source reference path (e.g. 'parameters.activity')."
        },
        "target": {
          "type": "string",
          "description": "Target reference path (e.g. 'audio.buses.ambient.gain')."
        },
        "scale": {
          "type": "number",
          "description": "Numeric source multiplier. Defaults to 1."
        },
        "offset": {
          "type": "number",
          "description": "Numeric offset applied after scaling. Defaults to 0."
        },
        "clamp": {
          "type": "array",
          "minItems": 2,
          "maxItems": 2,
          "items": {
            "type": "number"
          },
          "description": "Inclusive [minimum, maximum] clamp applied to the transformed binding value."
        },
        "smoothing": {
          "$ref": "#/definitions/DurationSpec",
          "description": "Optional smoothing low-pass duration."
        },
        "when": {
          "$ref": "#/definitions/ConditionSpec",
          "description": "Optional condition; defaults to true."
        }
      }
    },
    "ValueSpec": {
      "description": "Universal value expression (literal, reference, random, weighted choice, or operation).",
      "oneOf": [
        {
          "type": "number",
          "description": "Literal numeric constant."
        },
        {
          "type": "boolean",
          "description": "Literal boolean constant."
        },
        {
          "type": "string",
          "description": "Literal string or color constant."
        },
        {
          "type": "object",
          "required": [
            "ref"
          ],
          "additionalProperties": false,
          "properties": {
            "ref": {
              "type": "string",
              "pattern": "^[a-z][a-z0-9_-]*(\\.[a-z][a-z0-9_-]*)+$",
              "description": "Dot-separated reference path."
            }
          }
        },
        {
          "type": "object",
          "required": [
            "random"
          ],
          "additionalProperties": false,
          "properties": {
            "random": {
              "type": "object",
              "required": [
                "min",
                "max"
              ],
              "additionalProperties": false,
              "properties": {
                "min": {
                  "type": "number"
                },
                "max": {
                  "type": "number"
                },
                "integer": {
                  "type": "boolean"
                },
                "distribution": {
                  "type": "string",
                  "enum": [
                    "uniform",
                    "gaussian"
                  ]
                }
              }
            }
          }
        },
        {
          "type": "object",
          "required": [
            "choose"
          ],
          "additionalProperties": false,
          "properties": {
            "choose": {
              "type": "array",
              "minItems": 1,
              "items": {
                "type": "object",
                "required": [
                  "value",
                  "weight"
                ],
                "additionalProperties": false,
                "properties": {
                  "value": {},
                  "weight": {
                    "type": "number",
                    "exclusiveMinimum": 0
                  }
                }
              }
            }
          }
        },
        {
          "type": "object",
          "required": [
            "op",
            "args"
          ],
          "additionalProperties": false,
          "properties": {
            "op": {
              "type": "string",
              "enum": [
                "abs",
                "negate",
                "round",
                "floor",
                "ceil",
                "add",
                "subtract",
                "multiply",
                "divide",
                "min",
                "max",
                "clamp",
                "lerp"
              ]
            },
            "args": {
              "type": "array",
              "items": {
                "$ref": "#/definitions/ValueSpec"
              }
            }
          }
        }
      ]
    },
    "ConditionSpec": {
      "description": "Boolean condition expression (comparison, and, or, not).",
      "oneOf": [
        {
          "type": "object",
          "required": [
            "op",
            "left",
            "right"
          ],
          "additionalProperties": false,
          "properties": {
            "op": {
              "type": "string",
              "enum": [
                "eq",
                "ne",
                "gt",
                "gte",
                "lt",
                "lte"
              ]
            },
            "left": {
              "$ref": "#/definitions/ValueSpec"
            },
            "right": {
              "$ref": "#/definitions/ValueSpec"
            }
          }
        },
        {
          "type": "object",
          "required": [
            "and"
          ],
          "additionalProperties": false,
          "properties": {
            "and": {
              "type": "array",
              "minItems": 1,
              "items": {
                "$ref": "#/definitions/ConditionSpec"
              }
            }
          }
        },
        {
          "type": "object",
          "required": [
            "or"
          ],
          "additionalProperties": false,
          "properties": {
            "or": {
              "type": "array",
              "minItems": 1,
              "items": {
                "$ref": "#/definitions/ConditionSpec"
              }
            }
          }
        },
        {
          "type": "object",
          "required": [
            "not"
          ],
          "additionalProperties": false,
          "properties": {
            "not": {
              "$ref": "#/definitions/ConditionSpec"
            }
          }
        }
      ]
    },
    "DurationSpec": {
      "type": "string",
      "pattern": "^([0-9]+(\\.[0-9]+)?)(ms|s|m|h)$",
      "description": "Normalized duration literal string (e.g. '250ms', '4s', '1.5m', '1h')."
    },
    "AudioPartial": {
      "type": "object",
      "description": "One custom-waveform partial (Format Specification 14.7).",
      "required": [
        "ratio",
        "gain"
      ],
      "additionalProperties": false,
      "properties": {
        "ratio": {
          "description": "Partial frequency as a multiple of the node frequency.",
          "anyOf": [
            {
              "type": "number",
              "minimum": 0.001,
              "maximum": 256
            },
            {
              "type": "object"
            }
          ]
        },
        "gain": {
          "description": "Linear amplitude relative to the fundamental.",
          "anyOf": [
            {
              "type": "number",
              "minimum": 0,
              "maximum": 1
            },
            {
              "type": "object"
            }
          ]
        },
        "phase": {
          "description": "Starting phase offset in degrees.",
          "anyOf": [
            {
              "type": "number",
              "minimum": 0,
              "exclusiveMaximum": 360
            },
            {
              "type": "object"
            }
          ]
        }
      }
    },
    "AudioResonatorMode": {
      "type": "object",
      "description": "One resonator mode (Format Specification 15.10).",
      "additionalProperties": false,
      "oneOf": [
        {
          "required": [
            "ratio"
          ]
        },
        {
          "required": [
            "frequency"
          ]
        }
      ],
      "properties": {
        "ratio": {
          "description": "Mode frequency as a multiple of the fundamental.",
          "anyOf": [
            {
              "type": "number",
              "minimum": 0.001,
              "maximum": 256
            },
            {
              "type": "object"
            }
          ]
        },
        "frequency": {
          "description": "Absolute mode frequency in Hz.",
          "anyOf": [
            {
              "type": "number",
              "minimum": 0.1,
              "maximum": 24000
            },
            {
              "type": "object"
            }
          ]
        },
        "gain": {
          "description": "Linear amplitude of the mode.",
          "anyOf": [
            {
              "type": "number",
              "minimum": 0,
              "maximum": 1
            },
            {
              "type": "object"
            }
          ]
        },
        "decay": {
          "$ref": "#/definitions/DurationSpec"
        }
      }
    },
    "AudioNode": {
      "type": "object",
      "description": "One audio graph node, keyed by node ID (Format Specification 14.3).",
      "required": [
        "type"
      ],
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "oscillator",
            "noise",
            "impulse",
            "constant",
            "lfo",
            "sample-hold",
            "gain",
            "filter",
            "compressor",
            "waveshaper",
            "delay",
            "reverb",
            "stereo-pan",
            "mixer",
            "resonator",
            "component"
          ]
        }
      },
      "allOf": [
        {
          "if": {
            "properties": {
              "type": {
                "const": "oscillator"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Oscillator (14.7).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "waveform": {
                "type": "string",
                "enum": [
                  "sine",
                  "triangle",
                  "square",
                  "sawtooth",
                  "custom"
                ]
              },
              "frequency": {
                "description": "Frequency in Hz.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0.1,
                    "maximum": 24000
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "detune": {
                "description": "Detune in cents.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": -4800,
                    "maximum": 4800
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "harmonics": {
                "type": "array",
                "minItems": 1,
                "maxItems": 64,
                "items": {
                  "$ref": "#/definitions/AudioPartial"
                }
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "noise"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Noise (14.8).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "color": {
                "type": "string",
                "enum": [
                  "white",
                  "pink",
                  "brown"
                ]
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "impulse"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Impulse (14.9).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "color": {
                "type": "string",
                "enum": [
                  "white",
                  "pink",
                  "brown"
                ]
              },
              "duration": {
                "$ref": "#/definitions/DurationSpec"
              },
              "amplitude": {
                "description": "Peak amplitude.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0,
                    "maximum": 1
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "decay": {
                "type": "string",
                "enum": [
                  "flat",
                  "linear",
                  "exponential"
                ]
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "constant"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Constant control source (14.10).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "value": {
                "description": "Constant control value.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": -1000,
                    "maximum": 1000
                  },
                  {
                    "type": "object"
                  }
                ]
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "lfo"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "LFO control source (14.11).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "waveform": {
                "type": "string",
                "enum": [
                  "sine",
                  "triangle",
                  "square",
                  "sawtooth"
                ]
              },
              "frequency": {
                "description": "LFO rate in Hz.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0.001,
                    "maximum": 40
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "amplitude": {
                "description": "Output amplitude.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0,
                    "maximum": 1000
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "polarity": {
                "type": "string",
                "enum": [
                  "bipolar",
                  "unipolar"
                ]
              },
              "phase": {
                "description": "Starting phase in degrees.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0,
                    "exclusiveMaximum": 360
                  },
                  {
                    "type": "object"
                  }
                ]
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "sample-hold"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Sample-and-hold control source (14.12).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "rate": {
                "description": "Tick rate in Hz.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0.01,
                    "maximum": 100
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "min": {
                "description": "Lower draw bound.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": -1000,
                    "maximum": 1000
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "max": {
                "description": "Upper draw bound.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": -1000,
                    "maximum": 1000
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "slew": {
                "$ref": "#/definitions/DurationSpec"
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "gain"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Gain (15.2).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "gain": {
                "description": "Linear gain.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0,
                    "maximum": 4
                  },
                  {
                    "type": "object"
                  }
                ]
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "filter"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Filter (15.3).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "mode": {
                "type": "string",
                "enum": [
                  "lowpass",
                  "highpass",
                  "bandpass",
                  "notch",
                  "peaking",
                  "lowshelf",
                  "highshelf",
                  "allpass"
                ]
              },
              "frequency": {
                "description": "Cutoff or center frequency in Hz.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 10,
                    "maximum": 24000
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "q": {
                "description": "Filter Q.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0.0001,
                    "maximum": 100
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "gain": {
                "description": "Shelf or peak gain in dB.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": -40,
                    "maximum": 40
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "detune": {
                "description": "Detune in cents.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": -4800,
                    "maximum": 4800
                  },
                  {
                    "type": "object"
                  }
                ]
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "compressor"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Compressor (15.4).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "threshold": {
                "description": "Threshold in dB.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": -100,
                    "maximum": 0
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "knee": {
                "description": "Knee width in dB.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0,
                    "maximum": 40
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "ratio": {
                "description": "Compression ratio.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 1,
                    "maximum": 20
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "attack": {
                "$ref": "#/definitions/DurationSpec"
              },
              "release": {
                "$ref": "#/definitions/DurationSpec"
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "waveshaper"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Waveshaper (15.5).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "shape": {
                "type": "string",
                "enum": [
                  "soft-clip",
                  "hard-clip",
                  "saturation"
                ]
              },
              "amount": {
                "description": "Shaping amount.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0,
                    "maximum": 1
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "oversample": {
                "type": "string",
                "enum": [
                  "none",
                  "2x",
                  "4x"
                ]
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "delay"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Delay (15.6).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "time": {
                "$ref": "#/definitions/DurationSpec"
              },
              "feedback": {
                "description": "Internal feedback amount.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0,
                    "maximum": 0.95
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "mix": {
                "description": "Dry/wet blend.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0,
                    "maximum": 1
                  },
                  {
                    "type": "object"
                  }
                ]
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "reverb"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Reverb (15.7).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "size": {
                "description": "Perceived space size.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0,
                    "maximum": 1
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "decay": {
                "$ref": "#/definitions/DurationSpec"
              },
              "damping": {
                "description": "High-frequency damping.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0,
                    "maximum": 1
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "predelay": {
                "$ref": "#/definitions/DurationSpec"
              },
              "mix": {
                "description": "Dry/wet blend.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0,
                    "maximum": 1
                  },
                  {
                    "type": "object"
                  }
                ]
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "stereo-pan"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Stereo pan (15.8).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "pan": {
                "description": "Stereo position.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": -1,
                    "maximum": 1
                  },
                  {
                    "type": "object"
                  }
                ]
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "mixer"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Mixer (15.9).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "resonator"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Resonator (15.10).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "fundamental": {
                "description": "Fundamental frequency in Hz.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0.1,
                    "maximum": 24000
                  },
                  {
                    "type": "object"
                  }
                ]
              },
              "modes": {
                "type": "array",
                "minItems": 1,
                "maxItems": 16,
                "items": {
                  "$ref": "#/definitions/AudioResonatorMode"
                }
              },
              "mix": {
                "description": "Dry/wet blend.",
                "anyOf": [
                  {
                    "type": "number",
                    "minimum": 0,
                    "maximum": 1
                  },
                  {
                    "type": "object"
                  }
                ]
              }
            },
            "required": [
              "type",
              "modes"
            ]
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "component"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "type": "object",
            "description": "Component instance (15.11).",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string"
              },
              "use": {
                "type": "string",
                "pattern": "^[a-z][a-z0-9_-]*$"
              },
              "values": {
                "type": "object",
                "propertyNames": {
                  "pattern": "^[a-z][a-z0-9_-]*$"
                },
                "additionalProperties": {
                  "$ref": "#/definitions/ValueSpec"
                }
              }
            },
            "required": [
              "type",
              "use"
            ]
          }
        }
      ]
    },
    "AudioRoute": {
      "type": "object",
      "description": "An audio or modulation route (Format Specification 15.12).",
      "required": [
        "from",
        "to"
      ],
      "additionalProperties": false,
      "properties": {
        "from": {
          "type": "string",
          "pattern": "^[a-z][a-z0-9_-]*$"
        },
        "to": {
          "type": "string",
          "pattern": "^[a-z][a-z0-9_-]*(\\.[a-z][a-z0-9_-]*)?$"
        },
        "depth": {
          "$ref": "#/definitions/ValueSpec"
        }
      }
    },
    "AudioNodeMap": {
      "type": "object",
      "minProperties": 1,
      "propertyNames": {
        "pattern": "^[a-z][a-z0-9_-]*$",
        "not": {
          "enum": [
            "output",
            "input"
          ]
        }
      },
      "additionalProperties": {
        "$ref": "#/definitions/AudioNode"
      }
    },
    "AudioRouteList": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/AudioRoute"
      }
    },
    "AudioRecipe": {
      "type": "object",
      "description": "A recipe graph, or a reference to a shared recipe (15.16).",
      "oneOf": [
        {
          "additionalProperties": false,
          "required": [
            "nodes"
          ],
          "properties": {
            "nodes": {
              "$ref": "#/definitions/AudioNodeMap"
            },
            "routes": {
              "$ref": "#/definitions/AudioRouteList"
            },
            "mode": {
              "type": "string",
              "enum": [
                "oneshot",
                "continuous"
              ]
            },
            "release": {
              "$ref": "#/definitions/DurationSpec"
            }
          }
        },
        {
          "additionalProperties": false,
          "required": [
            "use"
          ],
          "properties": {
            "use": {
              "type": "string",
              "pattern": "^[a-z][a-z0-9_-]*$"
            }
          }
        }
      ]
    },
    "AudioComponent": {
      "type": "object",
      "description": "A reusable audio component graph (15.15).",
      "required": [
        "nodes"
      ],
      "additionalProperties": false,
      "properties": {
        "nodes": {
          "$ref": "#/definitions/AudioNodeMap"
        },
        "routes": {
          "$ref": "#/definitions/AudioRouteList"
        },
        "input": {
          "type": "boolean"
        },
        "parameters": {
          "type": "object",
          "propertyNames": {
            "pattern": "^[a-z][a-z0-9_-]*$"
          },
          "additionalProperties": {
            "type": "object",
            "required": [
              "type"
            ],
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string",
                "const": "number"
              },
              "default": {
                "type": "number"
              },
              "min": {
                "type": "number"
              },
              "max": {
                "type": "number"
              },
              "unit": {
                "type": "string"
              }
            }
          }
        }
      }
    },
    "AudioBus": {
      "type": "object",
      "description": "A declared bus (15.17).",
      "additionalProperties": false,
      "properties": {
        "gain": {
          "description": "Bus gain in [0, 4].",
          "anyOf": [
            {
              "type": "number",
              "minimum": 0,
              "maximum": 4
            },
            {
              "type": "object"
            }
          ]
        }
      }
    },
    "Sound": {
      "type": "object",
      "description": "A sound definition (15.16).",
      "required": [
        "name",
        "recipe"
      ],
      "additionalProperties": false,
      "properties": {
        "name": {
          "type": "string",
          "minLength": 1,
          "maxLength": 128
        },
        "tags": {
          "type": "array",
          "maxItems": 16,
          "items": {
            "type": "string",
            "maxLength": 32
          }
        },
        "usage": {
          "type": "array",
          "minItems": 1,
          "items": {
            "type": "string",
            "enum": [
              "automatic",
              "manual",
              "scenario"
            ]
          }
        },
        "cadence": {
          "type": "object"
        },
        "bus": {
          "type": "string",
          "pattern": "^[a-z][a-z0-9_-]*$"
        },
        "recipe": {
          "$ref": "#/definitions/AudioRecipe"
        }
      }
    }
  }
}