{
 "id": "adx-audio-format",
 "name": "ADX Audio Format",
 "category": "audio",
 "identifiers": {
  "extensions": [
   "adx"
  ],
  "puid": [
   "fmt/840"
  ],
  "wikidata": [
   "Q290741"
  ],
  "magic": [
   {
    "offset": 0,
    "hex": "8000",
    "notes": "ADX V3"
   }
  ],
  "signatures": [
   {
    "name": "ADX V3",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "8000{16}0300{0-65535}286329435249"
     }
    ]
   },
   {
    "name": "ADX V4",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "8000{16}0400{0-65535}286329435249"
     }
    ]
   },
   {
    "name": "ADX V5",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "8000{16}0500{0-65535}286329435249"
     }
    ]
   },
   {
    "name": "ADX V8 encrypted",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "8000{16}0408{0-65535}286329435249"
     }
    ]
   },
   {
    "name": "ADX V9 encrypted",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "8000{16}0409{0-65535}286329435249"
     }
    ]
   }
  ]
 },
 "status": "unknown",
 "summary": "ADX is a proprietary audio storage and compression format developed by CRI Middleware. PRONOM currently holds one PUID for all known version numbers, with separate identification signatures for each.",
 "projects": [
  {
   "name": "PRONOM fmt/840",
   "url": "https://www.nationalarchives.gov.uk/PRONOM/fmt/840",
   "kind": "format-doc"
  },
  {
   "name": "Wikidata Q290741",
   "url": "https://www.wikidata.org/wiki/Q290741",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-20",
 "aliases": [],
 "structure": [],
 "parsers": [],
 "tools": [],
 "conversions": [],
 "samples": [],
 "claims": [],
 "verification": []
}