{
  "title": "Musical instrument repair reference tone data for AI",
  "source_page": "https://fiund.com/industries/instrument-repair-reference-tone-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "A changed microphone gain can prevent an audible-level comparison",
    "context": "An owned instrument produces original isolated practice tones, represented by dummy recording metadata. No commercial music, customer recording or tuning instruction is supplied.",
    "records": [
      [
        "IT1",
        "Tone pair A metadata",
        "Before and after use reference R, microphone position P and gain G. Reviewer records a specific audible difference under that matched setup."
      ],
      [
        "IT2",
        "Tone pair B metadata",
        "Same stated instrument alias, but after-recording gain changes from G to G2; level difference observed."
      ],
      [
        "IT3",
        "Review scope",
        "No calibrated level conversion for G2 and no independent performance or durability test supplied."
      ]
    ],
    "question": "Which pair has matched recording conditions for its documented audible comparison, and can B's level difference be attributed to the instrument adjustment alone?",
    "answer": "IT1 explicitly preserves reference, microphone position and gain across pair A, supporting the reviewer's stated comparison under those conditions. IT2 changes gain, and IT3 supplies no correction, so B's level difference cannot be attributed to an instrument adjustment alone. Keep the recorded setup and reviewer finding separate from broader performance claims; neither pair establishes durability or a universally improved instrument.",
    "failureModes": [
      "Attributing an output-level change entirely to repair when recording gain also changed.",
      "Treating a narrowly matched tone comparison as proof of broad performance improvement."
    ],
    "fields": [
      [
        "Instrument alias and reference",
        "Defines the source and comparison anchor."
      ],
      [
        "Microphone position and gain",
        "Preserves material recording conditions."
      ],
      [
        "Reviewer finding and measurement scope",
        "Limits the supported audible claim."
      ]
    ],
    "holdout": "Keep gain fixed but change the tuning reference or microphone position. Require a new setup-comparability check rather than relying on a matching file label.",
    "boundary": "Use original isolated tones and cleared performers. Exclude commercial songs, customer sessions, serials and unapproved recordings."
  }
}