{
  "generated": "2026-09-13T09:39:28.553Z",
  "kind": "Synthetic software benchmark",
  "physicalDeviceTesting": "Not completed. No iPhone, Android, laptop microphone or physical guitar accuracy claim.",
  "sampleRates": [
    44100,
    48000,
    96000,
    192000
  ],
  "uniqueOpenStringFrequencies": 33,
  "frequencyRangeHz": [
    46.2493028389543,
    391.99543598174927
  ],
  "results": [
    {
      "scenario": "pure",
      "cases": 396,
      "detected": 396,
      "missed": 0,
      "wrongOctave": 0,
      "confidenceAtLeast94Percent": 396,
      "medianAbsoluteErrorCents": 0.00021120198429765244,
      "p95AbsoluteErrorCents": 0.002349285042709474,
      "maxAbsoluteErrorCents": 0.005573670966867984,
      "maxComputationMsThisRuntime": 16.159176000000002
    },
    {
      "scenario": "guitar harmonics",
      "cases": 396,
      "detected": 396,
      "missed": 0,
      "wrongOctave": 0,
      "confidenceAtLeast94Percent": 396,
      "medianAbsoluteErrorCents": 0.001415024206093426,
      "p95AbsoluteErrorCents": 0.011650363496070069,
      "maxAbsoluteErrorCents": 0.024472895393728576,
      "maxComputationMsThisRuntime": 13.287813999999798
    },
    {
      "scenario": "quiet",
      "cases": 396,
      "detected": 396,
      "missed": 0,
      "wrongOctave": 0,
      "confidenceAtLeast94Percent": 396,
      "medianAbsoluteErrorCents": 0.0014150521777958349,
      "p95AbsoluteErrorCents": 0.01165032028047157,
      "maxAbsoluteErrorCents": 0.02447290712881457,
      "maxComputationMsThisRuntime": 11.17207099999996
    },
    {
      "scenario": "background noise",
      "cases": 396,
      "detected": 396,
      "missed": 0,
      "wrongOctave": 0,
      "confidenceAtLeast94Percent": 396,
      "medianAbsoluteErrorCents": 0.11727540139036781,
      "p95AbsoluteErrorCents": 1.2337128777349875,
      "maxAbsoluteErrorCents": 7.360507769533992,
      "maxComputationMsThisRuntime": 11.492533000000549
    },
    {
      "scenario": "weak fundamental",
      "cases": 396,
      "detected": 396,
      "missed": 0,
      "wrongOctave": 0,
      "confidenceAtLeast94Percent": 396,
      "medianAbsoluteErrorCents": 0.001053933503534938,
      "p95AbsoluteErrorCents": 0.014919621381248145,
      "maxAbsoluteErrorCents": 0.026639700688573784,
      "maxComputationMsThisRuntime": 11.111709000000701
    }
  ],
  "noiseChecks": {
    "cases": 100,
    "falseDetections": 0
  },
  "limitations": [
    "Synthetic tones do not reproduce every instrument, pickup, room or microphone.",
    "Processing time is measured in the build runtime, not on a visitor device.",
    "Missing or ambiguous fundamentals can still produce octave errors.",
    "Latency and false in-tune rates on physical devices require independent reference testing."
  ],
  "method": "Deterministic synthetic tones at -35, 0 and +35 cents for every distinct preset pitch at four sample rates. Confidence is YIN periodicity, not a calibrated probability. Software version 13. Raw-difference interpolation after YIN period selection."
}