{
  "dateBeijing": "2026-10-20",
  "timestampBasis": "ISO timestamps in capturedAtUtc and run fields are raw execution-host clock readings, not certified wall-clock UTC or publication times. They are preserved without offset. Publication uses Cloudflare service time converted to Asia/Shanghai.",
  "startedAtUtc": "2026-10-20T01:53:54.055Z",
  "replayMode": false,
  "scope": "Two project-authored sources, retained WAV and first-generation 64 kbps MP3, then serial second- and third-generation MP3 encodings at the same selected encoder settings. Actual offline CPU transcription; not browser conversion, a physical-phone test, a DAW or listening test, accuracy, a recommended generation limit, or a competitor test.",
  "sourceAppSha256": "e42f9b0b60bb6fd73b2539a1ae9ca3b09f34ab874e35423162b384df68c19660",
  "model": {
    "manifestSha256": "1ed1aaee3409ec1dc098c8b01f430c0911f6fe9412e7af8086750f9e8f302f68",
    "weightsSha256": "b142a95737a52e1e412d5f92e73d8bb80dfe8d04941acc0702f11f4524fb377c"
  },
  "sourceConstruction": {
    "sampleRate": 22050,
    "totalSamples": 70560,
    "firstSample": 4410,
    "fadeSamples": 220,
    "amplitude": 0.35,
    "slots": 3,
    "slotSamples": 17641,
    "frequencyHz": 440,
    "referencePitch": 69,
    "internalBoundarySamples": [
      22051,
      39692
    ],
    "mp3BitrateKbps": 128,
    "onsetThreshold": 0.25,
    "frameThreshold": 0.25,
    "minNoteLengthFrames": 5
  },
  "parameters": {
    "sampleRate": 22050,
    "targetMp3Kbps": 64,
    "generations": [
      1,
      2,
      3
    ],
    "onsetThreshold": 0.25,
    "frameThreshold": 0.25,
    "minNoteLengthFrames": 5
  },
  "environment": {
    "node": "v24.19.0",
    "platform": "win32",
    "backend": "cpu",
    "basicPitch": "1.0.1",
    "tensorflow": "3.21.0",
    "midiWriter": "2.0.28",
    "ffmpegVersion": "ffmpeg version 6.0-essentials_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers"
  },
  "controls": [
    {
      "id": "first-only-wav",
      "caseId": "first-only",
      "generation": 0,
      "format": "wav",
      "targetBitrateKbps": null,
      "inputFilename": "first-only-wav.wav",
      "inputBytes": 141164,
      "inputSha256": "5717d14a433763ad08676a3194a5f5cce6645149cf5cccb106e0d039f475f7c2",
      "parentId": null,
      "parentInputFilename": null,
      "parentInputSha256": null,
      "encodingArguments": null,
      "encodingProvenance": "retained_exact_input",
      "retainedEncodingArguments": null,
      "inputStream": {
        "codec": "pcm_s16le ([1][0][0][0] / 0x0001)",
        "sampleRateHz": 22050,
        "channelLayout": "1 channels",
        "reportedStreamKbps": 352,
        "inputAudioStreamLine": "Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s",
        "rawInputSection": "Guessed Channel Layout for Input Stream #0.0 : mono\r\nInput #0, wav, from 'C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\first-only-wav.wav':\r\n  Duration: 00:00:03.20, bitrate: 352 kb/s\r\n  Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s\r\n"
      },
      "streamMatchesDeclaredMono22050": true,
      "decoded": {
        "samples": 70560,
        "rms": 0.213730759654644,
        "peak": 0.3499755859375
      },
      "decodedFloat32LeSha256": "875936cfb58ca122635516035ade647533c9b7ae28fe0d9447a2579f45d45c17",
      "captureFilename": "first-only-wav-capture.json.gz",
      "captureSha256": "0c30695f73ce52870f30cd0754294ca5bf2fe1c1c733125fa3e86de55b8f52bf",
      "capturedAtUtc": "2026-10-18T03:59:52.990Z",
      "captureOrigin": "retained_prior_capture",
      "reusedFrom": {
        "evidence": "mp3-bitrate-2026-10-19",
        "id": "first-only-wav",
        "inputFilename": "first-only.wav",
        "inputSha256": "5717d14a433763ad08676a3194a5f5cce6645149cf5cccb106e0d039f475f7c2",
        "decodedFloat32LeSha256": "875936cfb58ca122635516035ade647533c9b7ae28fe0d9447a2579f45d45c17",
        "captureFilename": "first-only-wav-capture.json.gz",
        "captureSha256": "0c30695f73ce52870f30cd0754294ca5bf2fe1c1c733125fa3e86de55b8f52bf",
        "capturedAtUtc": "2026-10-18T03:59:52.990Z",
        "midiSha256": "9b06b137eac75cea4c89496acf1f66874d61bc446a2d993e239161af0179600d",
        "upstream": {
          "date": "2026-10-18",
          "id": "first-only",
          "format": "wav",
          "inputFilename": "first-only.wav",
          "captureFilename": "first-only-wav-capture.json.gz",
          "captureSha256": "0c30695f73ce52870f30cd0754294ca5bf2fe1c1c733125fa3e86de55b8f52bf",
          "capturedAtUtc": "2026-10-18T03:59:52.990Z"
        }
      },
      "inferenceExecutedThisRun": false,
      "midiFilename": "first-only-wav-cpu.mid",
      "midi": {
        "bytes": 109,
        "sha256": "9b06b137eac75cea4c89496acf1f66874d61bc446a2d993e239161af0179600d",
        "ppq": 480,
        "noteCount": 2,
        "notes": [
          {
            "pitch": 69,
            "ticks": 156,
            "durationTicks": 780,
            "startSeconds": 0.1625,
            "durationSeconds": 0.8125,
            "velocity": 0.6141732283464567
          },
          {
            "pitch": 69,
            "ticks": 947,
            "durationTicks": 1573,
            "startSeconds": 0.9864583333333333,
            "durationSeconds": 1.6385416666666668,
            "velocity": 0.6141732283464567
          }
        ]
      },
      "status": "midi_exported"
    },
    {
      "id": "first-only-g1",
      "caseId": "first-only",
      "generation": 1,
      "format": "mp3",
      "targetBitrateKbps": 64,
      "inputFilename": "first-only-g1.mp3",
      "inputBytes": 26374,
      "inputSha256": "e9a857dc9e39a8e8bbd4e8507b8ce0bd878c47b370ff60cbfc3b0295932286bc",
      "parentId": "first-only-wav",
      "parentInputFilename": "first-only-wav.wav",
      "parentInputSha256": "5717d14a433763ad08676a3194a5f5cce6645149cf5cccb106e0d039f475f7c2",
      "encodingArguments": null,
      "encodingProvenance": "retained_exact_input",
      "retainedEncodingArguments": [
        "-hide_banner",
        "-loglevel",
        "error",
        "-y",
        "-i",
        "C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-bitrate-2026-10-19\\first-only.wav",
        "-codec:a",
        "libmp3lame",
        "-ar",
        "22050",
        "-ac",
        "1",
        "-b:a",
        "64k",
        "C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-bitrate-2026-10-19\\first-only-64k.mp3"
      ],
      "inputStream": {
        "codec": "mp3",
        "sampleRateHz": 22050,
        "channelLayout": "mono",
        "reportedStreamKbps": 64,
        "inputAudioStreamLine": "Stream #0:0: Audio: mp3, 22050 Hz, mono, fltp, 64 kb/s",
        "rawInputSection": "Input #0, mp3, from 'C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\first-only-g1.mp3':\r\n  Metadata:\r\n    encoder         : Lavf60.3.100\r\n  Duration: 00:00:03.27, start: 0.050113, bitrate: 64 kb/s\r\n  Stream #0:0: Audio: mp3, 22050 Hz, mono, fltp, 64 kb/s\r\n"
      },
      "streamMatchesDeclaredMono22050": true,
      "decoded": {
        "samples": 70560,
        "rms": 0.2030264270967171,
        "peak": 0.33302342891693115
      },
      "decodedFloat32LeSha256": "2c5d5ed437e4c85c020f8139ba639a3838305dc84b99f59d67d6bd24c8c6a154",
      "captureFilename": "first-only-g1-capture.json.gz",
      "captureSha256": "62ead923f6fee772076754401803cd0585edcbe2f9e26ad0b92f0a6c801226fc",
      "capturedAtUtc": "2026-10-18T19:02:17.165Z",
      "captureOrigin": "retained_prior_capture",
      "reusedFrom": {
        "evidence": "mp3-bitrate-2026-10-19",
        "id": "first-only-64k",
        "inputFilename": "first-only-64k.mp3",
        "inputSha256": "e9a857dc9e39a8e8bbd4e8507b8ce0bd878c47b370ff60cbfc3b0295932286bc",
        "decodedFloat32LeSha256": "2c5d5ed437e4c85c020f8139ba639a3838305dc84b99f59d67d6bd24c8c6a154",
        "captureFilename": "first-only-64k-capture.json.gz",
        "captureSha256": "62ead923f6fee772076754401803cd0585edcbe2f9e26ad0b92f0a6c801226fc",
        "capturedAtUtc": "2026-10-18T19:02:17.165Z",
        "midiSha256": "9b06b137eac75cea4c89496acf1f66874d61bc446a2d993e239161af0179600d",
        "upstream": null
      },
      "inferenceExecutedThisRun": false,
      "midiFilename": "first-only-g1-cpu.mid",
      "midi": {
        "bytes": 109,
        "sha256": "9b06b137eac75cea4c89496acf1f66874d61bc446a2d993e239161af0179600d",
        "ppq": 480,
        "noteCount": 2,
        "notes": [
          {
            "pitch": 69,
            "ticks": 156,
            "durationTicks": 780,
            "startSeconds": 0.1625,
            "durationSeconds": 0.8125,
            "velocity": 0.6141732283464567
          },
          {
            "pitch": 69,
            "ticks": 947,
            "durationTicks": 1573,
            "startSeconds": 0.9864583333333333,
            "durationSeconds": 1.6385416666666668,
            "velocity": 0.6141732283464567
          }
        ]
      },
      "status": "midi_exported"
    },
    {
      "id": "first-only-g2",
      "caseId": "first-only",
      "generation": 2,
      "format": "mp3",
      "targetBitrateKbps": 64,
      "inputFilename": "first-only-g2.mp3",
      "inputBytes": 26374,
      "inputSha256": "24a4c8c7aec83d34e9211321fd7144815f38c7459592a18f5d6681da9d23d431",
      "parentId": "first-only-g1",
      "parentInputFilename": "first-only-g1.mp3",
      "parentInputSha256": "e9a857dc9e39a8e8bbd4e8507b8ce0bd878c47b370ff60cbfc3b0295932286bc",
      "encodingArguments": [
        "-hide_banner",
        "-loglevel",
        "error",
        "-y",
        "-i",
        "C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\first-only-g1.mp3",
        "-codec:a",
        "libmp3lame",
        "-ar",
        "22050",
        "-ac",
        "1",
        "-b:a",
        "64k",
        "C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\first-only-g2.mp3"
      ],
      "encodingProvenance": "serial_encode_of_immediate_parent",
      "retainedEncodingArguments": null,
      "inputStream": {
        "codec": "mp3",
        "sampleRateHz": 22050,
        "channelLayout": "mono",
        "reportedStreamKbps": 64,
        "inputAudioStreamLine": "Stream #0:0: Audio: mp3, 22050 Hz, mono, fltp, 64 kb/s",
        "rawInputSection": "Input #0, mp3, from 'C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\first-only-g2.mp3':\r\n  Metadata:\r\n    encoder         : Lavf60.3.100\r\n  Duration: 00:00:03.27, start: 0.050113, bitrate: 64 kb/s\r\n  Stream #0:0: Audio: mp3, 22050 Hz, mono, fltp, 64 kb/s\r\n"
      },
      "streamMatchesDeclaredMono22050": true,
      "decoded": {
        "samples": 70560,
        "rms": 0.19286663590148645,
        "peak": 0.3181164860725403
      },
      "decodedFloat32LeSha256": "1ee928f6f56f51f23114038e0bf66569c0e283f00ddee4260050543a2bc9e06f",
      "captureFilename": "first-only-g2-capture.json.gz",
      "captureSha256": "dfcbb9c1da79031f443d420528a876343e5c36c047b1e2d30be35069b5d5954f",
      "capturedAtUtc": "2026-10-20T01:54:22.747Z",
      "captureOrigin": "new_oct20_inference",
      "reusedFrom": null,
      "inferenceExecutedThisRun": true,
      "midiFilename": "first-only-g2-cpu.mid",
      "midi": {
        "bytes": 109,
        "sha256": "2c64416239e0d59f4a804e36072b49536153065719756867cfbfc0a8855b932a",
        "ppq": 480,
        "noteCount": 2,
        "notes": [
          {
            "pitch": 69,
            "ticks": 156,
            "durationTicks": 780,
            "startSeconds": 0.1625,
            "durationSeconds": 0.8125,
            "velocity": 0.6141732283464567
          },
          {
            "pitch": 69,
            "ticks": 947,
            "durationTicks": 1573,
            "startSeconds": 0.9864583333333333,
            "durationSeconds": 1.6385416666666668,
            "velocity": 0.5984251968503937
          }
        ]
      },
      "status": "midi_exported"
    },
    {
      "id": "first-only-g3",
      "caseId": "first-only",
      "generation": 3,
      "format": "mp3",
      "targetBitrateKbps": 64,
      "inputFilename": "first-only-g3.mp3",
      "inputBytes": 26374,
      "inputSha256": "6c08000d626a1757130e053a0c18c7bab84a2eb08d42b2a6d964ace7f2fbf6d0",
      "parentId": "first-only-g2",
      "parentInputFilename": "first-only-g2.mp3",
      "parentInputSha256": "24a4c8c7aec83d34e9211321fd7144815f38c7459592a18f5d6681da9d23d431",
      "encodingArguments": [
        "-hide_banner",
        "-loglevel",
        "error",
        "-y",
        "-i",
        "C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\first-only-g2.mp3",
        "-codec:a",
        "libmp3lame",
        "-ar",
        "22050",
        "-ac",
        "1",
        "-b:a",
        "64k",
        "C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\first-only-g3.mp3"
      ],
      "encodingProvenance": "serial_encode_of_immediate_parent",
      "retainedEncodingArguments": null,
      "inputStream": {
        "codec": "mp3",
        "sampleRateHz": 22050,
        "channelLayout": "mono",
        "reportedStreamKbps": 64,
        "inputAudioStreamLine": "Stream #0:0: Audio: mp3, 22050 Hz, mono, fltp, 64 kb/s",
        "rawInputSection": "Input #0, mp3, from 'C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\first-only-g3.mp3':\r\n  Metadata:\r\n    encoder         : Lavf60.3.100\r\n  Duration: 00:00:03.27, start: 0.050113, bitrate: 64 kb/s\r\n  Stream #0:0: Audio: mp3, 22050 Hz, mono, fltp, 64 kb/s\r\n"
      },
      "streamMatchesDeclaredMono22050": true,
      "decoded": {
        "samples": 70560,
        "rms": 0.1832149101187981,
        "peak": 0.30383917689323425
      },
      "decodedFloat32LeSha256": "bf2694bf8fc8f928c51d2bd446f4d83e0b8e48b1bd329e6f82487a8ba0e4349d",
      "captureFilename": "first-only-g3-capture.json.gz",
      "captureSha256": "3f605b523ff1abc296e81972186d8512983ae1b1b81b204abef50898904ca6fb",
      "capturedAtUtc": "2026-10-20T01:54:47.881Z",
      "captureOrigin": "new_oct20_inference",
      "reusedFrom": null,
      "inferenceExecutedThisRun": true,
      "midiFilename": "first-only-g3-cpu.mid",
      "midi": {
        "bytes": 109,
        "sha256": "649ad44cc8934b9cc42844fe89bd5ca2e9b013dcc7f75ff7d54db40e847971eb",
        "ppq": 480,
        "noteCount": 2,
        "notes": [
          {
            "pitch": 69,
            "ticks": 156,
            "durationTicks": 791,
            "startSeconds": 0.1625,
            "durationSeconds": 0.8239583333333333,
            "velocity": 0.6062992125984252
          },
          {
            "pitch": 69,
            "ticks": 959,
            "durationTicks": 1562,
            "startSeconds": 0.9989583333333333,
            "durationSeconds": 1.6270833333333332,
            "velocity": 0.5905511811023622
          }
        ]
      },
      "status": "midi_exported"
    },
    {
      "id": "second-only-wav",
      "caseId": "second-only",
      "generation": 0,
      "format": "wav",
      "targetBitrateKbps": null,
      "inputFilename": "second-only-wav.wav",
      "inputBytes": 141164,
      "inputSha256": "85d935ba4b881059cf2fb3254f2c7fc08818ebd65126d9aca12933411be51ece",
      "parentId": null,
      "parentInputFilename": null,
      "parentInputSha256": null,
      "encodingArguments": null,
      "encodingProvenance": "retained_exact_input",
      "retainedEncodingArguments": null,
      "inputStream": {
        "codec": "pcm_s16le ([1][0][0][0] / 0x0001)",
        "sampleRateHz": 22050,
        "channelLayout": "1 channels",
        "reportedStreamKbps": 352,
        "inputAudioStreamLine": "Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s",
        "rawInputSection": "Guessed Channel Layout for Input Stream #0.0 : mono\r\nInput #0, wav, from 'C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\second-only-wav.wav':\r\n  Duration: 00:00:03.20, bitrate: 352 kb/s\r\n  Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s\r\n"
      },
      "streamMatchesDeclaredMono22050": true,
      "decoded": {
        "samples": 70560,
        "rms": 0.21372871633384571,
        "peak": 0.3499755859375
      },
      "decodedFloat32LeSha256": "099f84ce5952a53447ae5b62332a663d8fc17d10b8f9027e88600c0403d0f915",
      "captureFilename": "second-only-wav-capture.json.gz",
      "captureSha256": "c1334d608de171abadfd9499a6c71e0ca7fbea595324c199b85f1b408495f0fd",
      "capturedAtUtc": "2026-10-18T04:00:55.335Z",
      "captureOrigin": "retained_prior_capture",
      "reusedFrom": {
        "evidence": "mp3-bitrate-2026-10-19",
        "id": "second-only-wav",
        "inputFilename": "second-only.wav",
        "inputSha256": "85d935ba4b881059cf2fb3254f2c7fc08818ebd65126d9aca12933411be51ece",
        "decodedFloat32LeSha256": "099f84ce5952a53447ae5b62332a663d8fc17d10b8f9027e88600c0403d0f915",
        "captureFilename": "second-only-wav-capture.json.gz",
        "captureSha256": "c1334d608de171abadfd9499a6c71e0ca7fbea595324c199b85f1b408495f0fd",
        "capturedAtUtc": "2026-10-18T04:00:55.335Z",
        "midiSha256": "d579396eb3a4f000c3cd18587271d5a0dbba44e1f6699f2d62e9697adc1270ad",
        "upstream": {
          "date": "2026-10-18",
          "id": "second-only",
          "format": "wav",
          "inputFilename": "second-only.wav",
          "captureFilename": "second-only-wav-capture.json.gz",
          "captureSha256": "c1334d608de171abadfd9499a6c71e0ca7fbea595324c199b85f1b408495f0fd",
          "capturedAtUtc": "2026-10-18T04:00:55.335Z"
        }
      },
      "inferenceExecutedThisRun": false,
      "midiFilename": "second-only-wav-cpu.mid",
      "midi": {
        "bytes": 109,
        "sha256": "d579396eb3a4f000c3cd18587271d5a0dbba44e1f6699f2d62e9697adc1270ad",
        "ppq": 480,
        "noteCount": 2,
        "notes": [
          {
            "pitch": 69,
            "ticks": 156,
            "durationTicks": 1560,
            "startSeconds": 0.1625,
            "durationSeconds": 1.625,
            "velocity": 0.6141732283464567
          },
          {
            "pitch": 69,
            "ticks": 1728,
            "durationTicks": 793,
            "startSeconds": 1.8,
            "durationSeconds": 0.8260416666666666,
            "velocity": 0.6062992125984252
          }
        ]
      },
      "status": "midi_exported"
    },
    {
      "id": "second-only-g1",
      "caseId": "second-only",
      "generation": 1,
      "format": "mp3",
      "targetBitrateKbps": 64,
      "inputFilename": "second-only-g1.mp3",
      "inputBytes": 26374,
      "inputSha256": "5c6d9d94db38c94b0e8bf811da7e9f15626cee90c28948cb2773c3eb858579fe",
      "parentId": "second-only-wav",
      "parentInputFilename": "second-only-wav.wav",
      "parentInputSha256": "85d935ba4b881059cf2fb3254f2c7fc08818ebd65126d9aca12933411be51ece",
      "encodingArguments": null,
      "encodingProvenance": "retained_exact_input",
      "retainedEncodingArguments": [
        "-hide_banner",
        "-loglevel",
        "error",
        "-y",
        "-i",
        "C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-bitrate-2026-10-19\\second-only.wav",
        "-codec:a",
        "libmp3lame",
        "-ar",
        "22050",
        "-ac",
        "1",
        "-b:a",
        "64k",
        "C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-bitrate-2026-10-19\\second-only-64k.mp3"
      ],
      "inputStream": {
        "codec": "mp3",
        "sampleRateHz": 22050,
        "channelLayout": "mono",
        "reportedStreamKbps": 64,
        "inputAudioStreamLine": "Stream #0:0: Audio: mp3, 22050 Hz, mono, fltp, 64 kb/s",
        "rawInputSection": "Input #0, mp3, from 'C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\second-only-g1.mp3':\r\n  Metadata:\r\n    encoder         : Lavf60.3.100\r\n  Duration: 00:00:03.27, start: 0.050113, bitrate: 64 kb/s\r\n  Stream #0:0: Audio: mp3, 22050 Hz, mono, fltp, 64 kb/s\r\n"
      },
      "streamMatchesDeclaredMono22050": true,
      "decoded": {
        "samples": 70560,
        "rms": 0.2030379401686516,
        "peak": 0.33880212903022766
      },
      "decodedFloat32LeSha256": "cf14e43d28fde131602db152f1071c44d74454bd71b1bb1d98dacce98c0a1add",
      "captureFilename": "second-only-g1-capture.json.gz",
      "captureSha256": "2d04c782a3b98d5d09a856ef937de90dffa6c04afb0a47233bf1422fad8d9b16",
      "capturedAtUtc": "2026-10-18T19:03:32.511Z",
      "captureOrigin": "retained_prior_capture",
      "reusedFrom": {
        "evidence": "mp3-bitrate-2026-10-19",
        "id": "second-only-64k",
        "inputFilename": "second-only-64k.mp3",
        "inputSha256": "5c6d9d94db38c94b0e8bf811da7e9f15626cee90c28948cb2773c3eb858579fe",
        "decodedFloat32LeSha256": "cf14e43d28fde131602db152f1071c44d74454bd71b1bb1d98dacce98c0a1add",
        "captureFilename": "second-only-64k-capture.json.gz",
        "captureSha256": "2d04c782a3b98d5d09a856ef937de90dffa6c04afb0a47233bf1422fad8d9b16",
        "capturedAtUtc": "2026-10-18T19:03:32.511Z",
        "midiSha256": "3cca788b6844af29fc4fe9e1df3db083a02f9904842dc5a0515d8c97e7548423",
        "upstream": null
      },
      "inferenceExecutedThisRun": false,
      "midiFilename": "second-only-g1-cpu.mid",
      "midi": {
        "bytes": 109,
        "sha256": "3cca788b6844af29fc4fe9e1df3db083a02f9904842dc5a0515d8c97e7548423",
        "ppq": 480,
        "noteCount": 2,
        "notes": [
          {
            "pitch": 69,
            "ticks": 156,
            "durationTicks": 1560,
            "startSeconds": 0.1625,
            "durationSeconds": 1.625,
            "velocity": 0.6141732283464567
          },
          {
            "pitch": 69,
            "ticks": 1728,
            "durationTicks": 793,
            "startSeconds": 1.8,
            "durationSeconds": 0.8260416666666666,
            "velocity": 0.5984251968503937
          }
        ]
      },
      "status": "midi_exported"
    },
    {
      "id": "second-only-g2",
      "caseId": "second-only",
      "generation": 2,
      "format": "mp3",
      "targetBitrateKbps": 64,
      "inputFilename": "second-only-g2.mp3",
      "inputBytes": 26374,
      "inputSha256": "1e6d89599b1c5cdc3c2c7d02a81d18d5ecefa8c27740e7c55e9e66b8a9b1b606",
      "parentId": "second-only-g1",
      "parentInputFilename": "second-only-g1.mp3",
      "parentInputSha256": "5c6d9d94db38c94b0e8bf811da7e9f15626cee90c28948cb2773c3eb858579fe",
      "encodingArguments": [
        "-hide_banner",
        "-loglevel",
        "error",
        "-y",
        "-i",
        "C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\second-only-g1.mp3",
        "-codec:a",
        "libmp3lame",
        "-ar",
        "22050",
        "-ac",
        "1",
        "-b:a",
        "64k",
        "C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\second-only-g2.mp3"
      ],
      "encodingProvenance": "serial_encode_of_immediate_parent",
      "retainedEncodingArguments": null,
      "inputStream": {
        "codec": "mp3",
        "sampleRateHz": 22050,
        "channelLayout": "mono",
        "reportedStreamKbps": 64,
        "inputAudioStreamLine": "Stream #0:0: Audio: mp3, 22050 Hz, mono, fltp, 64 kb/s",
        "rawInputSection": "Input #0, mp3, from 'C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\second-only-g2.mp3':\r\n  Metadata:\r\n    encoder         : Lavf60.3.100\r\n  Duration: 00:00:03.27, start: 0.050113, bitrate: 64 kb/s\r\n  Stream #0:0: Audio: mp3, 22050 Hz, mono, fltp, 64 kb/s\r\n"
      },
      "streamMatchesDeclaredMono22050": true,
      "decoded": {
        "samples": 70560,
        "rms": 0.19287940277335525,
        "peak": 0.3226141333580017
      },
      "decodedFloat32LeSha256": "8196d680836446f6a888e4bace6e97a0d0bc708c65f5d2d5d2853062f6ab9e7f",
      "captureFilename": "second-only-g2-capture.json.gz",
      "captureSha256": "11a7caf09ecb18d8a33862f842a11eb11d03690ad69f8eb0b892a1520c423099",
      "capturedAtUtc": "2026-10-20T01:55:07.954Z",
      "captureOrigin": "new_oct20_inference",
      "reusedFrom": null,
      "inferenceExecutedThisRun": true,
      "midiFilename": "second-only-g2-cpu.mid",
      "midi": {
        "bytes": 109,
        "sha256": "c0dc9e89af4f9aaf2ac8007813ac847360e98f110634db5a62a2de6fa3530b8e",
        "ppq": 480,
        "noteCount": 2,
        "notes": [
          {
            "pitch": 69,
            "ticks": 156,
            "durationTicks": 1560,
            "startSeconds": 0.1625,
            "durationSeconds": 1.625,
            "velocity": 0.6062992125984252
          },
          {
            "pitch": 69,
            "ticks": 1728,
            "durationTicks": 793,
            "startSeconds": 1.8,
            "durationSeconds": 0.8260416666666666,
            "velocity": 0.5905511811023622
          }
        ]
      },
      "status": "midi_exported"
    },
    {
      "id": "second-only-g3",
      "caseId": "second-only",
      "generation": 3,
      "format": "mp3",
      "targetBitrateKbps": 64,
      "inputFilename": "second-only-g3.mp3",
      "inputBytes": 26374,
      "inputSha256": "dfea0cd2abe0c71dd93fd6db9348e254caedbe7267045bd6b26d0624df86ce8e",
      "parentId": "second-only-g2",
      "parentInputFilename": "second-only-g2.mp3",
      "parentInputSha256": "1e6d89599b1c5cdc3c2c7d02a81d18d5ecefa8c27740e7c55e9e66b8a9b1b606",
      "encodingArguments": [
        "-hide_banner",
        "-loglevel",
        "error",
        "-y",
        "-i",
        "C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\second-only-g2.mp3",
        "-codec:a",
        "libmp3lame",
        "-ar",
        "22050",
        "-ac",
        "1",
        "-b:a",
        "64k",
        "C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\second-only-g3.mp3"
      ],
      "encodingProvenance": "serial_encode_of_immediate_parent",
      "retainedEncodingArguments": null,
      "inputStream": {
        "codec": "mp3",
        "sampleRateHz": 22050,
        "channelLayout": "mono",
        "reportedStreamKbps": 64,
        "inputAudioStreamLine": "Stream #0:0: Audio: mp3, 22050 Hz, mono, fltp, 64 kb/s",
        "rawInputSection": "Input #0, mp3, from 'C:\\Users\\Administrator\\Documents\\Codex\\2026-09-29\\less-ilang-type-command-lang-zh\\outputs\\mp3-to-midi-site\\src\\evidence\\mp3-generations-2026-10-20\\second-only-g3.mp3':\r\n  Metadata:\r\n    encoder         : Lavf60.3.100\r\n  Duration: 00:00:03.27, start: 0.050113, bitrate: 64 kb/s\r\n  Stream #0:0: Audio: mp3, 22050 Hz, mono, fltp, 64 kb/s\r\n"
      },
      "streamMatchesDeclaredMono22050": true,
      "decoded": {
        "samples": 70560,
        "rms": 0.18322809313478666,
        "peak": 0.306491494178772
      },
      "decodedFloat32LeSha256": "d4cb8a4386c7c9f6b2bd1c71c3bac13352ab6dc265fa7c11873e4ab23b0be669",
      "captureFilename": "second-only-g3-capture.json.gz",
      "captureSha256": "aed0cd2c98eb2a7034632c90ee37c926d9b380873012f92904716ea43cea8f11",
      "capturedAtUtc": "2026-10-20T01:57:21.840Z",
      "captureOrigin": "new_oct20_inference",
      "reusedFrom": null,
      "inferenceExecutedThisRun": true,
      "midiFilename": "second-only-g3-cpu.mid",
      "midi": {
        "bytes": 109,
        "sha256": "c0dc9e89af4f9aaf2ac8007813ac847360e98f110634db5a62a2de6fa3530b8e",
        "ppq": 480,
        "noteCount": 2,
        "notes": [
          {
            "pitch": 69,
            "ticks": 156,
            "durationTicks": 1560,
            "startSeconds": 0.1625,
            "durationSeconds": 1.625,
            "velocity": 0.6062992125984252
          },
          {
            "pitch": 69,
            "ticks": 1728,
            "durationTicks": 793,
            "startSeconds": 1.8,
            "durationSeconds": 0.8260416666666666,
            "velocity": 0.5905511811023622
          }
        ]
      },
      "status": "midi_exported"
    }
  ],
  "parentComparisons": [
    {
      "id": "first-only-g1",
      "referenceId": "first-only-wav",
      "basis": "immediate_parent",
      "candidateInput": "first-only-g1.mp3",
      "referenceInput": "first-only-wav.wav",
      "candidateMidi": "first-only-g1-cpu.mid",
      "referenceMidi": "first-only-wav-cpu.mid",
      "candidateCount": 2,
      "referenceCount": 2,
      "countDifference": {
        "formula": "candidateCount - referenceCount",
        "value": 0
      },
      "inputBytesIdentical": false,
      "decodedSamplesIdentical": false,
      "geometryIdentical": true,
      "allNoteFieldsIdentical": true,
      "midiBytesIdentical": true
    },
    {
      "id": "first-only-g2",
      "referenceId": "first-only-g1",
      "basis": "immediate_parent",
      "candidateInput": "first-only-g2.mp3",
      "referenceInput": "first-only-g1.mp3",
      "candidateMidi": "first-only-g2-cpu.mid",
      "referenceMidi": "first-only-g1-cpu.mid",
      "candidateCount": 2,
      "referenceCount": 2,
      "countDifference": {
        "formula": "candidateCount - referenceCount",
        "value": 0
      },
      "inputBytesIdentical": false,
      "decodedSamplesIdentical": false,
      "geometryIdentical": true,
      "allNoteFieldsIdentical": false,
      "midiBytesIdentical": false
    },
    {
      "id": "first-only-g3",
      "referenceId": "first-only-g2",
      "basis": "immediate_parent",
      "candidateInput": "first-only-g3.mp3",
      "referenceInput": "first-only-g2.mp3",
      "candidateMidi": "first-only-g3-cpu.mid",
      "referenceMidi": "first-only-g2-cpu.mid",
      "candidateCount": 2,
      "referenceCount": 2,
      "countDifference": {
        "formula": "candidateCount - referenceCount",
        "value": 0
      },
      "inputBytesIdentical": false,
      "decodedSamplesIdentical": false,
      "geometryIdentical": false,
      "allNoteFieldsIdentical": false,
      "midiBytesIdentical": false
    },
    {
      "id": "second-only-g1",
      "referenceId": "second-only-wav",
      "basis": "immediate_parent",
      "candidateInput": "second-only-g1.mp3",
      "referenceInput": "second-only-wav.wav",
      "candidateMidi": "second-only-g1-cpu.mid",
      "referenceMidi": "second-only-wav-cpu.mid",
      "candidateCount": 2,
      "referenceCount": 2,
      "countDifference": {
        "formula": "candidateCount - referenceCount",
        "value": 0
      },
      "inputBytesIdentical": false,
      "decodedSamplesIdentical": false,
      "geometryIdentical": true,
      "allNoteFieldsIdentical": false,
      "midiBytesIdentical": false
    },
    {
      "id": "second-only-g2",
      "referenceId": "second-only-g1",
      "basis": "immediate_parent",
      "candidateInput": "second-only-g2.mp3",
      "referenceInput": "second-only-g1.mp3",
      "candidateMidi": "second-only-g2-cpu.mid",
      "referenceMidi": "second-only-g1-cpu.mid",
      "candidateCount": 2,
      "referenceCount": 2,
      "countDifference": {
        "formula": "candidateCount - referenceCount",
        "value": 0
      },
      "inputBytesIdentical": false,
      "decodedSamplesIdentical": false,
      "geometryIdentical": true,
      "allNoteFieldsIdentical": false,
      "midiBytesIdentical": false
    },
    {
      "id": "second-only-g3",
      "referenceId": "second-only-g2",
      "basis": "immediate_parent",
      "candidateInput": "second-only-g3.mp3",
      "referenceInput": "second-only-g2.mp3",
      "candidateMidi": "second-only-g3-cpu.mid",
      "referenceMidi": "second-only-g2-cpu.mid",
      "candidateCount": 2,
      "referenceCount": 2,
      "countDifference": {
        "formula": "candidateCount - referenceCount",
        "value": 0
      },
      "inputBytesIdentical": false,
      "decodedSamplesIdentical": false,
      "geometryIdentical": true,
      "allNoteFieldsIdentical": true,
      "midiBytesIdentical": true
    }
  ],
  "wavComparisons": [
    {
      "id": "first-only-g1",
      "referenceId": "first-only-wav",
      "basis": "source_wav",
      "candidateInput": "first-only-g1.mp3",
      "referenceInput": "first-only-wav.wav",
      "candidateMidi": "first-only-g1-cpu.mid",
      "referenceMidi": "first-only-wav-cpu.mid",
      "candidateCount": 2,
      "referenceCount": 2,
      "countDifference": {
        "formula": "candidateCount - referenceCount",
        "value": 0
      },
      "inputBytesIdentical": false,
      "decodedSamplesIdentical": false,
      "geometryIdentical": true,
      "allNoteFieldsIdentical": true,
      "midiBytesIdentical": true
    },
    {
      "id": "first-only-g2",
      "referenceId": "first-only-wav",
      "basis": "source_wav",
      "candidateInput": "first-only-g2.mp3",
      "referenceInput": "first-only-wav.wav",
      "candidateMidi": "first-only-g2-cpu.mid",
      "referenceMidi": "first-only-wav-cpu.mid",
      "candidateCount": 2,
      "referenceCount": 2,
      "countDifference": {
        "formula": "candidateCount - referenceCount",
        "value": 0
      },
      "inputBytesIdentical": false,
      "decodedSamplesIdentical": false,
      "geometryIdentical": true,
      "allNoteFieldsIdentical": false,
      "midiBytesIdentical": false
    },
    {
      "id": "first-only-g3",
      "referenceId": "first-only-wav",
      "basis": "source_wav",
      "candidateInput": "first-only-g3.mp3",
      "referenceInput": "first-only-wav.wav",
      "candidateMidi": "first-only-g3-cpu.mid",
      "referenceMidi": "first-only-wav-cpu.mid",
      "candidateCount": 2,
      "referenceCount": 2,
      "countDifference": {
        "formula": "candidateCount - referenceCount",
        "value": 0
      },
      "inputBytesIdentical": false,
      "decodedSamplesIdentical": false,
      "geometryIdentical": false,
      "allNoteFieldsIdentical": false,
      "midiBytesIdentical": false
    },
    {
      "id": "second-only-g1",
      "referenceId": "second-only-wav",
      "basis": "source_wav",
      "candidateInput": "second-only-g1.mp3",
      "referenceInput": "second-only-wav.wav",
      "candidateMidi": "second-only-g1-cpu.mid",
      "referenceMidi": "second-only-wav-cpu.mid",
      "candidateCount": 2,
      "referenceCount": 2,
      "countDifference": {
        "formula": "candidateCount - referenceCount",
        "value": 0
      },
      "inputBytesIdentical": false,
      "decodedSamplesIdentical": false,
      "geometryIdentical": true,
      "allNoteFieldsIdentical": false,
      "midiBytesIdentical": false
    },
    {
      "id": "second-only-g2",
      "referenceId": "second-only-wav",
      "basis": "source_wav",
      "candidateInput": "second-only-g2.mp3",
      "referenceInput": "second-only-wav.wav",
      "candidateMidi": "second-only-g2-cpu.mid",
      "referenceMidi": "second-only-wav-cpu.mid",
      "candidateCount": 2,
      "referenceCount": 2,
      "countDifference": {
        "formula": "candidateCount - referenceCount",
        "value": 0
      },
      "inputBytesIdentical": false,
      "decodedSamplesIdentical": false,
      "geometryIdentical": true,
      "allNoteFieldsIdentical": false,
      "midiBytesIdentical": false
    },
    {
      "id": "second-only-g3",
      "referenceId": "second-only-wav",
      "basis": "source_wav",
      "candidateInput": "second-only-g3.mp3",
      "referenceInput": "second-only-wav.wav",
      "candidateMidi": "second-only-g3-cpu.mid",
      "referenceMidi": "second-only-wav-cpu.mid",
      "candidateCount": 2,
      "referenceCount": 2,
      "countDifference": {
        "formula": "candidateCount - referenceCount",
        "value": 0
      },
      "inputBytesIdentical": false,
      "decodedSamplesIdentical": false,
      "geometryIdentical": true,
      "allNoteFieldsIdentical": false,
      "midiBytesIdentical": false
    }
  ],
  "newModelEvaluationsThisRun": 4,
  "newOct20CaptureInputs": 4,
  "retainedPriorInputs": 4,
  "streamConfounds": [],
  "completedAtUtc": "2026-10-20T01:57:23.060Z"
}
