{
  "kind": "Original synthetic AAC timing diagnostic; not voice or accuracy benchmark",
  "toneHz": 440,
  "toneSeconds": 2,
  "leadingSilenceMilliseconds": [
    0,
    1000
  ],
  "sampleRate": 22050,
  "commands": [
    [
      "-y",
      "-f",
      "lavfi",
      "-i",
      "sine=frequency=440:sample_rate=22050:duration=2",
      "-ac",
      "1",
      "-c:a",
      "aac",
      "-b:a",
      "96k",
      "immediate.m4a"
    ],
    [
      "-y",
      "-f",
      "lavfi",
      "-i",
      "sine=frequency=440:sample_rate=22050:duration=2",
      "-af",
      "adelay=1000:all=1",
      "-ac",
      "1",
      "-c:a",
      "aac",
      "-b:a",
      "96k",
      "delayed.m4a"
    ]
  ],
  "files": [
    {
      "name": "immediate.m4a",
      "bytes": 17117,
      "sha256": "938ef2b3cdcc901e7554b56686b662921868ba37921a5e4c1db67a8b20b521c5"
    },
    {
      "name": "delayed.m4a",
      "bytes": 18175,
      "sha256": "3943cf1fb6b58edf2d21c31dc540743122940e5d1199f8770dfd557e7eaac26c"
    }
  ]
}