{
  "dateBeijing": "2026-10-07",
  "analyzedAtUtc": "2026-10-07T05:12:55.568Z",
  "scope": "Two actual Chrome exports from the unmodified live homepage on Windows, compared with the Oct 6 native-FFmpeg/Node-CPU exports of byte-identical generated WAV inputs. Single run per browser input; not isolated decoder/backend causation, repeatability, speed, accuracy, MP3, phone, DAW or competitor tests.",
  "liveOrigin": "https://audiomidiconverter.com/",
  "browserBackend": "Not exposed or independently observed; no GPU/backend claim.",
  "observedDownloadTimesWindowsLocal": {
    "fundamental": "2026-10-07 13:05:19",
    "secondDominant": "2026-10-07 13:09:08"
  },
  "browserInteraction": "Choose file, Convert to MIDI, Complete, Download .mid; actual Downloads files retained. The first automation download-event wait timed out, but the file existed and was copied and parsed; not a converter failure.",
  "priorReport": "../harmonics-2026-10-06/results.json",
  "unchangedSourceAppSha256": "e42f9b0b60bb6fd73b2539a1ae9ca3b09f34ab874e35423162b384df68c19660",
  "parameters": {
    "sampleRate": 22050,
    "durationSeconds": 2.5,
    "referencePitches": [
      48,
      52,
      55,
      60
    ],
    "starts": [
      0.2,
      0.75,
      1.3,
      1.85
    ],
    "toneDurationSeconds": 0.35,
    "edgeFadeSamples": 220,
    "targetSourceRms": 0.16,
    "bitDepth": 16,
    "mp3BitrateKbps": 128,
    "onsetThreshold": 0.25,
    "frameThreshold": 0.25,
    "minNoteLengthFrames": 5
  },
  "slotFormula": "argmin(abs((note.startSeconds + note.durationSeconds/2) - (sourceStart + 0.175)))",
  "results": [
    {
      "id": "fundamental",
      "label": "Fundamental only",
      "input": {
        "file": "fundamental.wav",
        "bytes": 110294,
        "sha256": "09fcad4b5394850439d2db7c3f26546582ca0780389d184506423f8f5a556f65",
        "equalsPriorFixture": true
      },
      "observedUi": "10 detected notes · 2.5 sec source · 179 B",
      "browser": {
        "bytes": 179,
        "sha256": "839b9858a98de9aa60231f92a666a690528833c9db59b6fb19900c609a531136",
        "noteCount": 10,
        "ppq": 480,
        "tracks": 1,
        "notes": [
          {
            "pitch": 48,
            "ticks": 134,
            "durationTicks": 67,
            "startSeconds": 0.13958333333333334,
            "durationSeconds": 0.06979166666666667,
            "velocity": 0.29133858267716534
          },
          {
            "pitch": 48,
            "ticks": 201,
            "durationTicks": 234,
            "startSeconds": 0.209375,
            "durationSeconds": 0.24375,
            "velocity": 0.6299212598425197
          },
          {
            "pitch": 48,
            "ticks": 435,
            "durationTicks": 89,
            "startSeconds": 0.453125,
            "durationSeconds": 0.09270833333333328,
            "velocity": 0.4094488188976378
          },
          {
            "pitch": 48,
            "ticks": 524,
            "durationTicks": 67,
            "startSeconds": 0.5458333333333333,
            "durationSeconds": 0.0697916666666667,
            "velocity": 0.29133858267716534
          },
          {
            "pitch": 52,
            "ticks": 724,
            "durationTicks": 256,
            "startSeconds": 0.7541666666666667,
            "durationSeconds": 0.2666666666666666,
            "velocity": 0.6456692913385826
          },
          {
            "pitch": 52,
            "ticks": 981,
            "durationTicks": 123,
            "startSeconds": 1.021875,
            "durationSeconds": 0.12812499999999982,
            "velocity": 0.36220472440944884
          },
          {
            "pitch": 55,
            "ticks": 1271,
            "durationTicks": 234,
            "startSeconds": 1.3239583333333333,
            "durationSeconds": 0.2437499999999999,
            "velocity": 0.6692913385826772
          },
          {
            "pitch": 55,
            "ticks": 1505,
            "durationTicks": 134,
            "startSeconds": 1.5677083333333333,
            "durationSeconds": 0.1395833333333334,
            "velocity": 0.29133858267716534
          },
          {
            "pitch": 60,
            "ticks": 1783,
            "durationTicks": 269,
            "startSeconds": 1.8572916666666666,
            "durationSeconds": 0.2802083333333336,
            "velocity": 0.6141732283464567
          },
          {
            "pitch": 60,
            "ticks": 2052,
            "durationTicks": 89,
            "startSeconds": 2.1375,
            "durationSeconds": 0.09270833333333295,
            "velocity": 0.36220472440944884
          }
        ],
        "slots": [
          {
            "referencePitch": 48,
            "centre": 0.375,
            "events": 4,
            "pitches": [
              48
            ]
          },
          {
            "referencePitch": 52,
            "centre": 0.925,
            "events": 2,
            "pitches": [
              52
            ]
          },
          {
            "referencePitch": 55,
            "centre": 1.475,
            "events": 2,
            "pitches": [
              55
            ]
          },
          {
            "referencePitch": 60,
            "centre": 2.025,
            "events": 2,
            "pitches": [
              60
            ]
          }
        ]
      },
      "offline": {
        "bytes": 171,
        "sha256": "236a9a0bdc9d098423d2a22c4a961fe29f4280fed166eae518648bf3def4129a",
        "noteCount": 9,
        "ppq": 480,
        "tracks": 1,
        "notes": [
          {
            "pitch": 48,
            "ticks": 134,
            "durationTicks": 67,
            "startSeconds": 0.13958333333333334,
            "durationSeconds": 0.06979166666666667,
            "velocity": 0.29133858267716534
          },
          {
            "pitch": 48,
            "ticks": 201,
            "durationTicks": 234,
            "startSeconds": 0.209375,
            "durationSeconds": 0.24375,
            "velocity": 0.6299212598425197
          },
          {
            "pitch": 48,
            "ticks": 435,
            "durationTicks": 89,
            "startSeconds": 0.453125,
            "durationSeconds": 0.09270833333333328,
            "velocity": 0.4094488188976378
          },
          {
            "pitch": 48,
            "ticks": 524,
            "durationTicks": 67,
            "startSeconds": 0.5458333333333333,
            "durationSeconds": 0.0697916666666667,
            "velocity": 0.29133858267716534
          },
          {
            "pitch": 52,
            "ticks": 724,
            "durationTicks": 256,
            "startSeconds": 0.7541666666666667,
            "durationSeconds": 0.2666666666666666,
            "velocity": 0.6456692913385826
          },
          {
            "pitch": 52,
            "ticks": 981,
            "durationTicks": 123,
            "startSeconds": 1.021875,
            "durationSeconds": 0.12812499999999982,
            "velocity": 0.3543307086614173
          },
          {
            "pitch": 55,
            "ticks": 1271,
            "durationTicks": 234,
            "startSeconds": 1.3239583333333333,
            "durationSeconds": 0.2437499999999999,
            "velocity": 0.6614173228346457
          },
          {
            "pitch": 55,
            "ticks": 1505,
            "durationTicks": 134,
            "startSeconds": 1.5677083333333333,
            "durationSeconds": 0.1395833333333334,
            "velocity": 0.29133858267716534
          },
          {
            "pitch": 60,
            "ticks": 1783,
            "durationTicks": 358,
            "startSeconds": 1.8572916666666666,
            "durationSeconds": 0.37291666666666656,
            "velocity": 0.5590551181102362
          }
        ],
        "slots": [
          {
            "referencePitch": 48,
            "centre": 0.375,
            "events": 4,
            "pitches": [
              48
            ]
          },
          {
            "referencePitch": 52,
            "centre": 0.925,
            "events": 2,
            "pitches": [
              52
            ]
          },
          {
            "referencePitch": 55,
            "centre": 1.475,
            "events": 2,
            "pitches": [
              55
            ]
          },
          {
            "referencePitch": 60,
            "centre": 2.025,
            "events": 1,
            "pitches": [
              60
            ]
          }
        ]
      },
      "byteIdenticalMidi": false,
      "samePerSlotPitchSets": true,
      "samePerSlotEventCounts": false
    },
    {
      "id": "second-dominant",
      "label": "Stronger upper partials",
      "input": {
        "file": "second-dominant.wav",
        "bytes": 110294,
        "sha256": "6543b67173fca84f5e66e62dd88517d3b5f9d5cf186f6901142d15a7d3556858",
        "equalsPriorFixture": true
      },
      "observedUi": "13 detected notes · 2.5 sec source · 202 B",
      "browser": {
        "bytes": 202,
        "sha256": "de4decb67460c542962952ab9adfb513300604c4f2c7257da8887a7ad6154e64",
        "noteCount": 13,
        "ppq": 480,
        "tracks": 1,
        "notes": [
          {
            "pitch": 48,
            "ticks": 178,
            "durationTicks": 368,
            "startSeconds": 0.18541666666666667,
            "durationSeconds": 0.3833333333333333,
            "velocity": 0.5748031496062992
          },
          {
            "pitch": 67,
            "ticks": 189,
            "durationTicks": 323,
            "startSeconds": 0.196875,
            "durationSeconds": 0.3364583333333333,
            "velocity": 0.36220472440944884
          },
          {
            "pitch": 60,
            "ticks": 189,
            "durationTicks": 312,
            "startSeconds": 0.196875,
            "durationSeconds": 0.32499999999999996,
            "velocity": 0.3779527559055118
          },
          {
            "pitch": 71,
            "ticks": 713,
            "durationTicks": 312,
            "startSeconds": 0.7427083333333333,
            "durationSeconds": 0.32499999999999996,
            "velocity": 0.3464566929133858
          },
          {
            "pitch": 64,
            "ticks": 713,
            "durationTicks": 312,
            "startSeconds": 0.7427083333333333,
            "durationSeconds": 0.32499999999999996,
            "velocity": 0.33858267716535434
          },
          {
            "pitch": 52,
            "ticks": 713,
            "durationTicks": 357,
            "startSeconds": 0.7427083333333333,
            "durationSeconds": 0.37187499999999996,
            "velocity": 0.6062992125984252
          },
          {
            "pitch": 74,
            "ticks": 1248,
            "durationTicks": 312,
            "startSeconds": 1.3,
            "durationSeconds": 0.32499999999999996,
            "velocity": 0.33070866141732286
          },
          {
            "pitch": 67,
            "ticks": 1248,
            "durationTicks": 256,
            "startSeconds": 1.3,
            "durationSeconds": 0.2666666666666666,
            "velocity": 0.30708661417322836
          },
          {
            "pitch": 55,
            "ticks": 1248,
            "durationTicks": 312,
            "startSeconds": 1.3,
            "durationSeconds": 0.32499999999999996,
            "velocity": 0.6377952755905512
          },
          {
            "pitch": 55,
            "ticks": 1560,
            "durationTicks": 67,
            "startSeconds": 1.625,
            "durationSeconds": 0.0697916666666667,
            "velocity": 0.29133858267716534
          },
          {
            "pitch": 79,
            "ticks": 1783,
            "durationTicks": 313,
            "startSeconds": 1.8572916666666666,
            "durationSeconds": 0.32604166666666656,
            "velocity": 0.33070866141732286
          },
          {
            "pitch": 72,
            "ticks": 1783,
            "durationTicks": 280,
            "startSeconds": 1.8572916666666666,
            "durationSeconds": 0.29166666666666674,
            "velocity": 0.2677165354330709
          },
          {
            "pitch": 60,
            "ticks": 1783,
            "durationTicks": 347,
            "startSeconds": 1.8572916666666666,
            "durationSeconds": 0.36145833333333344,
            "velocity": 0.6377952755905512
          }
        ],
        "slots": [
          {
            "referencePitch": 48,
            "centre": 0.375,
            "events": 3,
            "pitches": [
              48,
              60,
              67
            ]
          },
          {
            "referencePitch": 52,
            "centre": 0.925,
            "events": 3,
            "pitches": [
              52,
              64,
              71
            ]
          },
          {
            "referencePitch": 55,
            "centre": 1.475,
            "events": 4,
            "pitches": [
              55,
              67,
              74
            ]
          },
          {
            "referencePitch": 60,
            "centre": 2.025,
            "events": 3,
            "pitches": [
              60,
              72,
              79
            ]
          }
        ]
      },
      "offline": {
        "bytes": 202,
        "sha256": "626e284560282a80f1ac066c47c35ca3d85d47dc49808eea0c554d2935cf14f3",
        "noteCount": 13,
        "ppq": 480,
        "tracks": 1,
        "notes": [
          {
            "pitch": 48,
            "ticks": 178,
            "durationTicks": 234,
            "startSeconds": 0.18541666666666667,
            "durationSeconds": 0.24374999999999997,
            "velocity": 0.6535433070866141
          },
          {
            "pitch": 67,
            "ticks": 189,
            "durationTicks": 323,
            "startSeconds": 0.196875,
            "durationSeconds": 0.3364583333333333,
            "velocity": 0.36220472440944884
          },
          {
            "pitch": 60,
            "ticks": 189,
            "durationTicks": 312,
            "startSeconds": 0.196875,
            "durationSeconds": 0.32499999999999996,
            "velocity": 0.3779527559055118
          },
          {
            "pitch": 48,
            "ticks": 412,
            "durationTicks": 134,
            "startSeconds": 0.42916666666666664,
            "durationSeconds": 0.13958333333333334,
            "velocity": 0.44881889763779526
          },
          {
            "pitch": 71,
            "ticks": 713,
            "durationTicks": 312,
            "startSeconds": 0.7427083333333333,
            "durationSeconds": 0.32499999999999996,
            "velocity": 0.3464566929133858
          },
          {
            "pitch": 64,
            "ticks": 713,
            "durationTicks": 312,
            "startSeconds": 0.7427083333333333,
            "durationSeconds": 0.32499999999999996,
            "velocity": 0.33858267716535434
          },
          {
            "pitch": 52,
            "ticks": 713,
            "durationTicks": 357,
            "startSeconds": 0.7427083333333333,
            "durationSeconds": 0.37187499999999996,
            "velocity": 0.6062992125984252
          },
          {
            "pitch": 74,
            "ticks": 1248,
            "durationTicks": 312,
            "startSeconds": 1.3,
            "durationSeconds": 0.32499999999999996,
            "velocity": 0.33070866141732286
          },
          {
            "pitch": 67,
            "ticks": 1248,
            "durationTicks": 256,
            "startSeconds": 1.3,
            "durationSeconds": 0.2666666666666666,
            "velocity": 0.30708661417322836
          },
          {
            "pitch": 55,
            "ticks": 1248,
            "durationTicks": 379,
            "startSeconds": 1.3,
            "durationSeconds": 0.39479166666666665,
            "velocity": 0.5748031496062992
          },
          {
            "pitch": 79,
            "ticks": 1783,
            "durationTicks": 313,
            "startSeconds": 1.8572916666666666,
            "durationSeconds": 0.32604166666666656,
            "velocity": 0.33070866141732286
          },
          {
            "pitch": 72,
            "ticks": 1783,
            "durationTicks": 269,
            "startSeconds": 1.8572916666666666,
            "durationSeconds": 0.2802083333333336,
            "velocity": 0.2677165354330709
          },
          {
            "pitch": 60,
            "ticks": 1783,
            "durationTicks": 347,
            "startSeconds": 1.8572916666666666,
            "durationSeconds": 0.36145833333333344,
            "velocity": 0.6377952755905512
          }
        ],
        "slots": [
          {
            "referencePitch": 48,
            "centre": 0.375,
            "events": 4,
            "pitches": [
              48,
              60,
              67
            ]
          },
          {
            "referencePitch": 52,
            "centre": 0.925,
            "events": 3,
            "pitches": [
              52,
              64,
              71
            ]
          },
          {
            "referencePitch": 55,
            "centre": 1.475,
            "events": 3,
            "pitches": [
              55,
              67,
              74
            ]
          },
          {
            "referencePitch": 60,
            "centre": 2.025,
            "events": 3,
            "pitches": [
              60,
              72,
              79
            ]
          }
        ]
      },
      "byteIdenticalMidi": false,
      "samePerSlotPitchSets": true,
      "samePerSlotEventCounts": false
    }
  ]
}