{
  "$schema": "../../data/schema/measurement.schema.json",
  "schema_version": "1.0.0",
  "language": "en",
  "creator": {
    "name": "Michelangelo Canonico",
    "role": "Creator and lead measurer",
    "affiliation": "Direct Sound Records"
  },
  "publisher": {
    "name": "Direct Sound Records",
    "url": "https://directsoundrecords.com/",
    "location_label": "London–Rome"
  },
  "software": {
    "name": "Groove Scope",
    "report_generator_label": "Groove Scope Reference",
    "application_version": "not_recorded",
    "analysis_method_version": "not_recorded",
    "platform": "not_recorded",
    "developer": "Michelangelo Canonico / Direct Sound Records"
  },
  "related_applications": [
    {
      "name": "Resonance Lab",
      "relationship": "Companion application for tonearm and cartridge resonance planning",
      "url": "https://directsoundrecords.com/resonance-lab/"
    }
  ],
  "measurement_type": "1 kHz Reference Check",
  "measurement_scope": [
    "playback speed",
    "rotational stability",
    "DIN-shaped wow and flutter",
    "channel balance",
    "electrical crosstalk",
    "distortion diagnostics",
    "harmonic profile",
    "rotation fingerprints"
  ],
  "license": "CC-BY-4.0",
  "measurement_id": "GS-2026-0006",
  "record_version": "0.9.0",
  "publication_status": "draft",
  "title": "Micro Seiki RX-5000 / SME V / Transfiguration Orpheus — 1 kHz Playback Check",
  "source_report_title": "Transfiguration Orpheus",
  "slug": "gs-2026-0006-transfiguration-orpheus-micro-seiki-rx-5000-sme-v-1-khz-reference-check",
  "measurement_datetime_local": "2026-09-26T16:24:00",
  "measurement_timezone": "not_recorded",
  "date_published": "2026-10-02",
  "sample_id": "not_recorded",
  "setup": {
    "turntable": "Micro Seiki RX-5000",
    "tonearm": "SME V",
    "cartridge": "Transfiguration Orpheus",
    "stylus": "not_recorded",
    "cartridge_hours": "not_recorded",
    "vertical_tracking_force_g": "not_recorded",
    "anti_skate_setting": "not_recorded",
    "alignment_geometry": "not_recorded",
    "azimuth_setting": "not_recorded",
    "vta_or_sra_setting": "not_recorded",
    "phono_stage": "not_recorded",
    "phono_gain_db": "not_recorded",
    "cartridge_loading": "not_recorded",
    "test_record": "not_recorded",
    "test_record_track": "not_recorded",
    "test_record_condition": "not_recorded",
    "nominal_test_tone_hz": 1000,
    "audio_interface_reported_label": "not_recorded",
    "audio_interface_full_model": "EVO4",
    "interface_gain_settings": "not_recorded",
    "sample_rate_hz": "not_recorded",
    "bit_depth": "not_recorded",
    "capture_device": "not_recorded",
    "channel_routing": "not_recorded",
    "measurement_location": "not_recorded"
  },
  "results": {
    "playback_rpm": {
      "value": 33.51,
      "classification": "primary",
      "condition": "under_stylus_load"
    },
    "playback_speed_error_percent": {
      "value": 0.52,
      "classification": "primary",
      "direction": "fast"
    },
    "settled_rpm": {
      "minimum": 33.42,
      "maximum": 33.58,
      "span": 0.16,
      "classification": "primary"
    },
    "din_shaped_wow_flutter_percent": {
      "value": 0.031,
      "classification": "primary"
    },
    "raw_speed_variation_percent": {
      "rms_plus_minus": 0.136,
      "two_sigma_plus_minus": 0.271,
      "classification": "unweighted_diagnostic"
    },
    "raw_wow_flutter_percent": {
      "wow_rms": 0.129,
      "flutter_rms": 0.039,
      "classification": "unweighted_diagnostic"
    },
    "channel_balance_db": {
      "value": -0.35,
      "classification": "diagnostic_only"
    },
    "crosstalk_1khz_db": {
      "average_separation": 19.5,
      "left_to_right": -19.1,
      "right_to_left": -19.8,
      "directional_difference": 0.64,
      "classification": "supporting"
    },
    "thd_percent": {
      "left": 0.87,
      "right": 1.18,
      "left_minus_right_percentage_points": -0.31,
      "classification": "diagnostic"
    },
    "harmonic_profile_db": {
      "h2": {
        "left": -41.3,
        "right": -38.6
      },
      "h3": {
        "left": -60.1,
        "right": -61.7
      },
      "h4": {
        "left": -75.2,
        "right": -77.1
      },
      "h5": {
        "left": -73.3,
        "right": -73.9
      },
      "classification": "diagnostic"
    },
    "harmonic_difference_summary_db": {
      "h2_right_higher": 2.7,
      "h3_left_higher": 1.6,
      "classification": "source_report_summary"
    },
    "harmonic_reliability": {
      "classification": "steady_during_recording",
      "quality_note": "Steady during recording. Suitable for setup guidance."
    }
  },
  "interpretation": {
    "summary": "The RX-5000 averaged 33.51 RPM, or +0.52%, while DIN-shaped wow and flutter measured 0.031%. That combination separates a notably high mean-speed reading from low measured rotational variation in this capture; it does not identify the cause. Average separation was 19.5 dB, and harmonic levels were reported steady during recording.",
    "recommendation": "Repeat the same capture with documented test-record track and setup settings to assess whether the speed and channel patterns recur.",
    "repeat_required": false
  },
  "provenance": {
    "source_type": "Groove Scope generated PDF report",
    "source_file": "report.pdf",
    "data_entry_method": "Values transcribed verbatim from the original PDF report; rounded differences are preserved rather than recalculated.",
    "raw_audio_published": false,
    "raw_audio_note": "No raw test-record audio is included.",
    "sample_ownership": "not_recorded",
    "setup_metadata_source": "The source PDF identifies the cartridge as Transfiguration Orpheus, but does not name the turntable, tonearm or input. The measurer supplied the Micro Seiki RX-5000, SME V and EVO4 identities; the supplied photograph visibly carries an RX-5000 badge.",
    "known_limitations": [
      "The source report does not identify the turntable, tonearm or input; those component identities were supplied by the measurer.",
      "Tracking force, anti-skate, alignment, phono stage, loading, test-record identity and track, gain, capture format, software versions, timezone, sample ownership and repeat count were not supplied.",
      "One supplied report; stability within a recording does not establish repeatability across sessions.",
      "THD and harmonic differences retain source-report precision and may differ from subtraction of rounded channel values."
    ],
    "fingerprint_channel_assignment": "Left/right assignments follow the supplied screenshot pair order. The supplied plots do not contain visible channel labels.",
    "photo_treatment": "AI-assisted cosmetic editorial hero removes the partial person and background distractions. Original HEIC preserved; graph screenshots are unretouched."
  },
  "files": {
    "human_readable_record": "README.md",
    "source_report": "report.pdf",
    "checksums": "checksums.sha256",
    "source_hero": "assets/source/hero-original.heic",
    "rotation_fingerprints": [
      "assets/source/speed-deviation-left.png",
      "assets/source/speed-deviation-right.png",
      "assets/source/level-modulation-left.png",
      "assets/source/level-modulation-right.png",
      "assets/source/opposite-channel-leakage-left.png",
      "assets/source/opposite-channel-leakage-right.png",
      "assets/source/harmonic-distortion-left.png",
      "assets/source/harmonic-distortion-right.png"
    ],
    "retouched_hero": "assets/hero-retouched.png",
    "image_edit_prompt": "assets/image-edit-prompt.txt"
  },
  "keywords": [
    "Groove Scope",
    "Direct Sound Records",
    "Michelangelo Canonico",
    "Micro Seiki RX-5000",
    "SME V",
    "Transfiguration Orpheus",
    "EVO4",
    "vinyl measurement",
    "rotation fingerprint",
    "wow and flutter",
    "cartridge crosstalk"
  ]
}