{
  "started": "2026-10-08T21:06:26.838Z",
  "ended": "2026-10-08T21:06:27.135Z",
  "date": "2026-10-09",
  "approvedKeyword": "wav to midi",
  "queueIndex": 20,
  "sourceCodeSHA256": "7f9c8b44a6ac99835b7e2f86c4f141385a1045396e40214c0afe6cee94e8f7ea",
  "fixture": {
    "actualGenerationRate": 44100,
    "originalFrequency": 440,
    "originalSeconds": 2,
    "channels": 1,
    "bits": 16,
    "amplitude": 0.35,
    "edgeSeconds": 0.008
  },
  "method": "Generate one A4 PCM payload; write three internally consistent WAV headers with declared rates44100/22050/88200 and corresponding byte rates. Audio payload identical. Parse actual16-bit samples and declared rate, run unchanged production downsample/detectNotes Balanced/buildMidi. No resampling during header relabeling; detector preprocessing follows each declared rate.",
  "results": [
    {
      "declaredRate": 44100,
      "decodedInterpretationSeconds": 2,
      "expectedInterpretationFrequency": 440,
      "pcmPayloadSHA256": "bc7cea47076c9ad6f417b2d9cab66751cc7c696d6325a8f3f978201cfc992d36",
      "sampleFrames": 88200,
      "input": {
        "file": "label-44100.wav",
        "bytes": 176444,
        "sha256": "7d316794474dc8bc2520ad9940da62f46290d928c7630d71407df4985569ab39"
      },
      "output": {
        "file": "label-44100.mid",
        "bytes": 42,
        "sha256": "445e24c302406b802b2fa81c9f16c35afcce405f7d497ed55a68c2f1fb87f30c",
        "noteCount": 1,
        "notes": [
          {
            "pitch": 69,
            "start": 0,
            "duration": 1.811156462585034,
            "velocity": 118
          }
        ]
      },
      "analysisSamples": 22050,
      "analysisRate": 11025
    },
    {
      "declaredRate": 22050,
      "decodedInterpretationSeconds": 4,
      "expectedInterpretationFrequency": 220,
      "pcmPayloadSHA256": "bc7cea47076c9ad6f417b2d9cab66751cc7c696d6325a8f3f978201cfc992d36",
      "sampleFrames": 88200,
      "input": {
        "file": "label-22050.wav",
        "bytes": 176444,
        "sha256": "a696b481602921b9ac70608227a194b130f3ed4d383bc620490d7c2a81883b35"
      },
      "output": {
        "file": "label-22050.mid",
        "bytes": 42,
        "sha256": "990eed24f4fd50a6c0ebd8af3c28ebd25ae75d7902c10544ac50c64360546715",
        "noteCount": 1,
        "notes": [
          {
            "pitch": 57,
            "start": 0,
            "duration": 3.8080725623582765,
            "velocity": 118
          }
        ]
      },
      "analysisSamples": 44100,
      "analysisRate": 11025
    },
    {
      "declaredRate": 88200,
      "decodedInterpretationSeconds": 1,
      "expectedInterpretationFrequency": 880,
      "pcmPayloadSHA256": "bc7cea47076c9ad6f417b2d9cab66751cc7c696d6325a8f3f978201cfc992d36",
      "sampleFrames": 88200,
      "input": {
        "file": "label-88200.wav",
        "bytes": 176444,
        "sha256": "28b0da58db4657218c99832758633dbc9752b819c50359af0871c36e63be5bea"
      },
      "output": {
        "file": "label-88200.mid",
        "bytes": 42,
        "sha256": "4fc97b24899dbfc9f2b7c885ae4bcf1cb7aabb9f8f44ba558bb7cb2b9fb763dc",
        "noteCount": 1,
        "notes": [
          {
            "pitch": 80,
            "start": 0,
            "duration": 0.7894784580498866,
            "velocity": 118
          }
        ]
      },
      "analysisSamples": 11025,
      "analysisRate": 11025
    }
  ],
  "limits": "Deliberately incorrect rate labels in two fixtures; not correctly resampled versions of the same recording. Code-level WAV interpretation, not browser decode/file-picker, listening, DAW compatibility, real music or general accuracy. Rate relabeling is an error demonstration, not a recommended repair. Correct source rate must be independently known before repairing metadata."
}