{
  "runId": "daily-20260930-wav-vs-mp3",
  "site": "https://mp3tomidiflow.com/",
  "method": "Separate live browser conversions of the same generated four-second mono melody: original WAV and an MP3 encoded from that WAV. MIDI events were parsed from each downloaded result.",
  "source": {
    "durationSeconds": 4,
    "sampleRateHz": 44100,
    "channels": 1,
    "encoding": "16-bit PCM WAV before MP3 encoding",
    "notes": ["C4 (MIDI 60)", "E4 (MIDI 64)", "G4 (MIDI 67)", "C5 (MIDI 72)"],
    "wav": {
      "file": "melody.wav",
      "bytes": 352844,
      "sha256": "7bb14447b510e2882f0d99bf419f44814e718ef01ec5ec8b1d2a180afacefa84"
    },
    "mp3": {
      "file": "melody.mp3",
      "bytes": 32617,
      "sha256": "2cf584b1e48114acb8a353f969963fb736a417818d3acffc7f7ff9a9f8a12df4"
    }
  },
  "conversions": {
    "wav": {
      "siteStatus": "melody.mid · 4 notes · 4.0 seconds",
      "midi": {
        "file": "wav-result.mid",
        "bytes": 72,
        "sha256": "9e1e4d39632ebc1b0e37374387fe8f738e6aeb47ba549f86138274587b5dd3f0"
      },
      "events": [
        {"midi": 60, "startSeconds": 0, "durationSeconds": 0.7895833333, "velocity": 0.7874015748},
        {"midi": 64, "startSeconds": 0.9052083333, "durationSeconds": 0.778125, "velocity": 0.8031496063},
        {"midi": 67, "startSeconds": 1.8114583333, "durationSeconds": 0.7677083333, "velocity": 0.8031496063},
        {"midi": 72, "startSeconds": 2.6833333333, "durationSeconds": 0.8010416667, "velocity": 0.7952755906}
      ]
    },
    "mp3": {
      "siteStatus": "melody.mid · 4 notes · 4.0 seconds",
      "midi": {
        "file": "mp3-result.mid",
        "bytes": 72,
        "sha256": "51c0d2ffa36bb174aeef193e89ef855fa46e7860be13df6301bcb67f97b4d30e"
      },
      "events": [
        {"midi": 60, "startSeconds": 0, "durationSeconds": 0.7895833333, "velocity": 0.7952755906},
        {"midi": 64, "startSeconds": 0.9052083333, "durationSeconds": 0.778125, "velocity": 0.8031496063},
        {"midi": 67, "startSeconds": 1.8114583333, "durationSeconds": 0.7677083333, "velocity": 0.7952755906},
        {"midi": 72, "startSeconds": 2.6947916667, "durationSeconds": 0.7895833333, "velocity": 0.7952755906}
      ]
    }
  },
  "scope": "One synthetic fixture on the live site. This does not establish a general WAV-versus-MP3 accuracy rule or explain the last-note offset."
}