{
  "schema_version": "1.0.0",
  "updated": "2026-09-05",
  "measurements": [
    {
      "measurement_id": "GS-2026-0003",
      "title": "Audio-Technica AT-OC9XML — Rega P3 / Rega RB330 / Audio Research SP20 — 1 kHz Reference Check",
      "short_title": "AT-OC9XML / Rega P3 / SP20",
      "date": "2026-09-05",
      "status": "draft",
      "hero_image": "assets/GS-2026-0003/web/hero-2400.webp",
      "summary": "Excellent in-system AT-OC9XML separation and channel balance with near-nominal Rega P3 speed and four L/R rotation-fingerprint views.",
      "primary_metrics": {"playback_rpm": 33.34, "speed_error_percent": 0.02, "din_shaped_wow_flutter_percent": 0.03, "average_separation_db": 31.8},
      "measurement_url": "measurements/GS-2026-0003.html",
      "provenance_label": "DSR measurement session; sample ownership not recorded"
    }
  ]
}