{
  "id": "opi",
  "name": "Opi (Igbo side-blown wooden/horn trumpet)",
  "family": "wind",
  "class": "natural_trumpet",
  "axes": {
    "pitchFix": 0,
    "sustain": 1,
    "polyphony": -2,
    "harmonicity": 1,
    "register": -1,
    "range": -1,
    "articulation": 1,
    "transduction": -2,
    "dynamics": 1
  },
  "short": "opi",
  "parts": [
    {
      "id": "opi_material",
      "name": "Material",
      "variants": [
        {
          "id": "opi_wood",
          "default": true,
          "name": "Carved wooden tube with mouth hole",
          "descriptors": [
            "hoarse",
            "buzzing-timbre"
          ],
          "match_tokens": [
            "side-blown-trumpet",
            "igbo"
          ]
        },
        {
          "id": "opi_horn",
          "name": "Animal horn (elephant tusk / antelope)",
          "descriptors": [
            "braying",
            "raw"
          ],
          "match_tokens": [
            "horn-trumpet",
            "nigeria"
          ]
        }
      ]
    },
    {
      "id": "opi_role",
      "name": "Ensemble role",
      "variants": [
        {
          "id": "opi_title_music",
          "default": true,
          "name": "Title / chieftaincy ceremonial calls",
          "descriptors": [
            "ceremonial",
            "declamatory"
          ],
          "match_tokens": [
            "ritual-trumpet",
            "praise-song"
          ]
        },
        {
          "id": "opi_ensemble",
          "name": "Graded trumpet ensemble (interlocking hocket)",
          "descriptors": [
            "hocketing",
            "layered"
          ],
          "match_tokens": [
            "trumpet-ensemble",
            "interlocking"
          ]
        }
      ]
    }
  ],
  "_ownParts": [
    {
      "id": "opi_material",
      "name": "Material",
      "variants": [
        {
          "id": "opi_wood",
          "default": true,
          "name": "Carved wooden tube with mouth hole",
          "descriptors": [
            "hoarse",
            "buzzing-timbre"
          ],
          "match_tokens": [
            "side-blown-trumpet",
            "igbo"
          ]
        },
        {
          "id": "opi_horn",
          "name": "Animal horn (elephant tusk / antelope)",
          "descriptors": [
            "braying",
            "raw"
          ],
          "match_tokens": [
            "horn-trumpet",
            "nigeria"
          ]
        }
      ]
    },
    {
      "id": "opi_role",
      "name": "Ensemble role",
      "variants": [
        {
          "id": "opi_title_music",
          "default": true,
          "name": "Title / chieftaincy ceremonial calls",
          "descriptors": [
            "ceremonial",
            "declamatory"
          ],
          "match_tokens": [
            "ritual-trumpet",
            "praise-song"
          ]
        },
        {
          "id": "opi_ensemble",
          "name": "Graded trumpet ensemble (interlocking hocket)",
          "descriptors": [
            "hocketing",
            "layered"
          ],
          "match_tokens": [
            "trumpet-ensemble",
            "interlocking"
          ]
        }
      ]
    }
  ]
}