{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://got-feedback.github.io/feedpak-spec/schemas/notation.schema.json",
  "$comment": "SPDX-License-Identifier: MIT. feedpak notation_<id>.json (standard notation). See spec/feedpak-v1.md §7.6.",
  "title": "feedpak notation",
  "type": "object",
  "required": ["version", "staves", "measures"],
  "additionalProperties": true,
  "properties": {
    "version": { "type": "integer", "minimum": 1 },
    "instrument": { "type": "string" },
    "rights": { "type": "string" },
    "lyricist": { "type": "string" },
    "arranger": { "type": "string" },
    "staves": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["id", "clef"],
        "additionalProperties": true,
        "properties": {
          "id": { "type": "string" },
          "clef": { "type": "string", "enum": ["G2", "F4", "C3", "C4", "neutral"] },
          "label": { "type": "string" }
        }
      }
    },
    "measures": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["idx", "t"],
        "additionalProperties": true,
        "properties": {
          "idx": { "type": "integer", "minimum": 1 },
          "t": { "type": "number" },
          "ts": {
            "type": "array",
            "items": { "type": "integer", "minimum": 1 },
            "minItems": 2,
            "maxItems": 2
          },
          "beat_groups": { "type": "array", "items": { "type": "integer", "minimum": 1 } },
          "ks": { "type": "integer", "minimum": -7, "maximum": 7 },
          "tempo": { "type": "number", "exclusiveMinimum": 0 },
          "pickup": { "type": "boolean" },
          "staves": {
            "type": "object",
            "additionalProperties": {
              "type": "object",
              "additionalProperties": true,
              "properties": {
                "clef": { "type": "string", "enum": ["G2", "F4", "C3", "C4", "neutral"] },
                "voices": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "additionalProperties": true,
                    "properties": {
                      "v": { "type": "integer" },
                      "beats": {
                        "type": "array",
                        "items": {
                          "type": "object",
                          "required": ["t", "dur"],
                          "additionalProperties": true,
                          "properties": {
                            "t": { "type": "number" },
                            "dur": { "type": "integer", "enum": [1, 2, 4, 8, 16, 32] },
                            "dot": { "type": "integer", "minimum": 1, "maximum": 2 },
                            "rest": { "type": "boolean" },
                            "notes": {
                              "type": "array",
                              "items": {
                                "type": "object",
                                "required": ["midi"],
                                "additionalProperties": true,
                                "properties": {
                                  "midi": { "type": "integer", "minimum": 0, "maximum": 127 }
                                }
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}