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    "interpretation": "Retrospective qualitative selection, not an unbiased evaluation or human listening ranking. Frozen inference parameters and historical song-level ranking are unchanged."
  },
  "waveform": "RMS from rendered WAV; identical amplitude scale for all clips",
  "display_order_reason": "Presentation order: Fast Rhythm, Melody Progression, Steady Beat, Bright Groove, Light Ensemble."
}
