{
  "set": "audio-editing-v1",
  "tested_on": "2026-10-21",
  "method": "Synthetic 12-second mono 44.1 kHz PCM WAV. Browser UI: select 2-8 seconds, retain selection across cutter/fade tools, apply 0.25s fade-in and 0.5s fade-out; export/download 192 and 128 kbps MP3. Probe and decode actual downloads.",
  "sample": {
    "sourceSeconds": 12,
    "startSeconds": 2,
    "endSeconds": 8,
    "clipSeconds": 6,
    "fadeInSeconds": 0.25,
    "fadeOutSeconds": 0.5
  },
  "source_generation": {
    "kind": "synthetic sine tones",
    "pcm_bit_depth": 16,
    "sample_rate_hz": 44100,
    "channels": 1,
    "amplitude": 9000,
    "first_six_seconds_hz": 440,
    "last_six_seconds_hz": 660
  },
  "browser_display_seconds": 6.03,
  "limits": [
    "No subjective listening assessment",
    "No speech/music quality assessment",
    "No mobile or large-file test",
    "No independent privacy audit",
    "Other tools and input formats not tested"
  ],
  "files": [
    {
      "file": "synthetic-12s.wav",
      "url": "/evidence/audio-editing/v1/synthetic-12s.wav",
      "bytes": 1058444,
      "sha256": "17afb1883928e55cc936f7ddb22494e61ae76e5f2d9cad607afc58f22885dd76",
      "duration_seconds": 12.0,
      "codec": "pcm_s16le",
      "sample_rate_hz": 44100,
      "channels": 1,
      "audio_bitrate_bps": 705600
    },
    {
      "file": "clip-192.mp3",
      "url": "/evidence/audio-editing/v1/clip-192.mp3",
      "bytes": 145493,
      "sha256": "8f14a5998952b3f1844b1c7fa540381de4ee3a1392598c5142d8c7f26df48a31",
      "duration_seconds": 6.0,
      "codec": "mp3",
      "sample_rate_hz": 44100,
      "channels": 1,
      "audio_bitrate_bps": 192000,
      "decoded_seconds": 6.0,
      "rms_windows": {
        "0-0.05s": 712.4,
        "1-1.05s": 6173.5,
        "5-5.05s": 6172.73,
        "5.95-6s": 356.01
      }
    },
    {
      "file": "clip-128.mp3",
      "url": "/evidence/audio-editing/v1/clip-128.mp3",
      "bytes": 97010,
      "sha256": "6c27389ec11cc5bc36788a69396456c10062e19dec5bc8cac15ce22675f35fd6",
      "duration_seconds": 6.0,
      "codec": "mp3",
      "sample_rate_hz": 44100,
      "channels": 1,
      "audio_bitrate_bps": 128000,
      "decoded_seconds": 6.0,
      "rms_windows": {
        "0-0.05s": 697.74,
        "1-1.05s": 6045.81,
        "5-5.05s": 6045.78,
        "5.95-6s": 348.68
      }
    }
  ]
}