{
  "_description": "IPA phone label set used for training. id→symbol mapping from checkpoint phone_to_id.",
  "_n_classes": 45,
  "_notes": [
    "Class 0 ('sil') covers silence, pauses, and boundary markers (TIMIT h#/pau/epi, Buckeye SIL).",
    "TIMIT stop closure+release pairs (bcl+b, dcl+d, …) are merged into a single release phone.",
    "TIMIT 'er/axr' → ɹ̩ (syllabic r);  'el' → l̩;  'em' → m̩;  'en' → n̩.",
    "TIMIT 'ah/ax/ax-h' → ə  (schwa);  'dx' → ɾ  (flap);  'q' → ʔ  (glottal stop).",
    "Buckeye nasalised vowel variants (aen, own, …) are merged with their oral counterparts.",
    "IPA symbol sort order follows Python's default Unicode sort on the training code."
  ],
  "id2phone": {
    "0":  "sil",
    "1":  "aɪ",
    "2":  "aʊ",
    "3":  "b",
    "4":  "d",
    "5":  "dʒ",
    "6":  "eɪ",
    "7":  "f",
    "8":  "g",
    "9":  "h",
    "10": "i",
    "11": "j",
    "12": "k",
    "13": "l",
    "14": "l̩",
    "15": "m",
    "16": "m̩",
    "17": "n",
    "18": "n̩",
    "19": "oʊ",
    "20": "p",
    "21": "r",
    "22": "s",
    "23": "t",
    "24": "tʃ",
    "25": "u",
    "26": "v",
    "27": "w",
    "28": "z",
    "29": "æ",
    "30": "ð",
    "31": "ŋ",
    "32": "ɑ",
    "33": "ɔ",
    "34": "ɔɪ",
    "35": "ə",
    "36": "ɛ",
    "37": "ɪ",
    "38": "ɹ̩",
    "39": "ɾ",
    "40": "ʃ",
    "41": "ʊ",
    "42": "ʒ",
    "43": "ʔ",
    "44": "θ"
  },
  "phone2id": {
    "sil": 0,
    "aɪ":  1,
    "aʊ":  2,
    "b":   3,
    "d":   4,
    "dʒ":  5,
    "eɪ":  6,
    "f":   7,
    "g":   8,
    "h":   9,
    "i":   10,
    "j":   11,
    "k":   12,
    "l":   13,
    "l̩":  14,
    "m":   15,
    "m̩":  16,
    "n":   17,
    "n̩":  18,
    "oʊ":  19,
    "p":   20,
    "r":   21,
    "s":   22,
    "t":   23,
    "tʃ":  24,
    "u":   25,
    "v":   26,
    "w":   27,
    "z":   28,
    "æ":   29,
    "ð":   30,
    "ŋ":   31,
    "ɑ":   32,
    "ɔ":   33,
    "ɔɪ":  34,
    "ə":   35,
    "ɛ":   36,
    "ɪ":   37,
    "ɹ̩":  38,
    "ɾ":   39,
    "ʃ":   40,
    "ʊ":   41,
    "ʒ":   42,
    "ʔ":   43,
    "θ":   44
  }
}