mrinkl.github.io

{
  "type": "object",
  "properties": {
    "progression": {
      "type": "array",
      "description": "One chord per bar, 1 to 4 entries: numerals (i, VI, III, VII, bVII, V7) or names (Am, F, Bb, G7).",
      "minItems": 1,
      "maxItems": 4,
      "items": {
        "type": "string",
        "minLength": 1,
        "maxLength": 12,
        "description": "One chord as a Roman numeral (i, VI, bVII, V7, iiø7) or a chord name (Am, Fmaj7, G7, Bb)."
      }
    },
    "rhythm": {
      "type": "string",
      "enum": [
        "pad",
        "stab",
        "arp",
        "pulse",
        "offbeat"
      ],
      "description": "Articulation: pad (held), stab (short hits), arp (arpeggio), pulse (8ths), offbeat. Default per style."
    }
  },
  "required": [
    "progression"
  ],
  "additionalProperties": false
}