{
  "audit": {
    "cutoff": "2026-10-30",
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      "value": 19,
      "label": "Distinct native engine builds",
      "subcopy": "Unique executable fingerprints recorded in Studio release history through October 30, 2026.",
      "source": "nativeReleaseHistory"
    },
    {
      "value": 52,
      "label": "Detailed hardware bench trials",
      "subcopy": "Distinct trial reports reconstructed in the October 27 testing history; duplicate uploads merged.",
      "source": "benchHistory"
    },
    {
      "value": "6 h 53 m",
      "label": "Captured bench input",
      "subcopy": "Cumulative capture across the reported trials, not a continuous soak.",
      "source": "benchHistory"
    },
    {
      "value": 670,
      "label": "Studio release checks passed",
      "subcopy": "603 application and 67 desktop checks recorded for Studio 1.12.0 / Engine 1.6.0.",
      "source": "releaseValidation"
    }
  ],
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    "source": "dist/central-installer.json across tracked git history",
    "methodology": "Enumerate git log --format=%H -- dist/central-installer.json; parse each tracked manifest; count distinct nonempty nativeEngine.sha256 values. An app release may reuse an engine. A named engine version can have more than one executable fingerprint. Commits are not builds.",
    "distinctExecutableHashes": 19,
    "fingerprintedManifestRecords": 54,
    "manifestAffectingCommits": 57,
    "uniqueFingerprintedAppVersions": 50,
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    "qualification": "Conservative count of recorded binary fingerprints, not a count of every experimental or physical-hardware build. Do not add bench iteration counts to this count; overlap is not established.",
    "builds": [
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  "benchHistory": {
    "source": {
      "name": "FNT-Audio-Bench-Test-History.pdf",
      "compiled": "2026-10-27",
      "pages": [
        1,
        2,
        3,
        5,
        10,
        11,
        12,
        13
      ]
    },
    "distinctDetailedTrialReports": 52,
    "duplicateUploadsMerged": 2,
    "additionalSummaryOnlyStartupFailure": 1,
    "cumulativeCapturedInputDisplay": "6 h 53 m",
    "completedThirtyMinuteTrials": 9,
    "documentedBenchIterations": 14,
    "benchIterationRange": "0.1.0\u20130.2.3",
    "allDetailedReportsSampleRateHz": 48000,
    "recorderQueueDropEvidence": {
      "trials": 33,
      "range": "0.1.4 onward",
      "queueDrops": 0,
      "qualification": "Recorder queue drops are distinct from hardware input-position gaps, callback timing misses and listening reports. The later 64-sample Mixed68 endurance trials still failed."
    },
    "latestReportedHardwareStatus": {
      "mixed68At128Samples": "Five minutes with zero measured misses or gaps on 0.2.2.",
      "mixed68At64Samples": "Endurance attempt failed at 19:46.9 after a 128-frame input gap.",
      "bench0_2_3": "17 portable programs and race checks passed; owner NUX hardware results pending at report cutoff."
    },
    "methodology": "Use reconstructed T01\u2013T52 ledger; merge two duplicate report uploads; exclude the approximately 0.037-second summary-only 0.2.0 startup failure from detailed-report count and captured-time total. Completion of a 30-minute trial does not imply absence of timing warnings.",
    "qualification": "These are historical hardware tests on the documented fixed workloads. They do not qualify current native engine releases on every Windows interface, buffer or plugin."
  },
  "releaseValidation": {
    "sourcePaths": [
      "docs/release-1.12.0-validation.json",
      "docs/precision-studio-1.12.0.md",
      "docs/precision-engine-build.json"
    ],
    "studioVersion": "1.12.0",
    "engineVersion": "1.6.0",
    "applicationTests": 603,
    "desktopTests": 67,
    "studioCombinedChecks": 670,
    "connectUpdaterTestsSeparate": 68,
    "focusedRetroRerunExcludedFromTotal": 21,
    "failed": 0,
    "currentAppVersionAtCutoff": "1.12.1",
    "currentEngineVersionAtCutoff": "1.6.0",
    "engineSha256": "e97c36f05019d442243ccd756d7d09811915b3106eab22367cf2deca7d217f97",
    "qualification": "Per-release recorded test checks, not unique lifetime tests or engine-only tests. Do not sum counts from successive releases. The 21 focused tests overlap the full suite. Windows x64 cross-compilation and portable/browser fixtures do not establish physical Windows/ASIO qualification or licensed commercial-plugin execution."
  },
  "scopedPerformance": [
    {
      "label": "Single-insert control preparation",
      "beforeMedianMs": 9.79926,
      "afterMedianMs": 0.511457,
      "reductionPercent": 94.78065690674602,
      "beforeRuns": 3,
      "afterRuns": 3,
      "scope": "Twelve alternating changes to one FET threshold, including preparation and application; fixed 32 monitored stereo channels at 48 kHz with EQ, FET and amp inserts on every channel.",
      "baselineSourceCommit": "d8a19e0aaffde32270a05f9f57f4e06f60b1b3fe",
      "candidate": "Studio 1.12.0 / Engine 1.6.0",
      "sources": [
        "docs/precision-studio-1.12.0.md",
        "docs/precision-bench-results.json"
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    {
      "label": "Trim/pan mixer fixture CPU time",
      "beforeMedianMs": 133.599,
      "afterMedianMs": 95.5606,
      "reductionPercent": 28.472069401717082,
      "beforeRuns": 5,
      "afterRuns": 5,
      "scope": "No-insert mixer fixture; 32 monitored stereo channels at 48 kHz, +0.7 dB Pre and varied pan; processes one second of deterministic stereo input.",
      "baselineSourceCommit": "d8a19e0aaffde32270a05f9f57f4e06f60b1b3fe",
      "candidate": "Studio 1.12.0 / Engine 1.6.0",
      "sources": [
        "docs/precision-studio-1.12.0.md",
        "docs/precision-mixer-bench.json"
      ]
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    {
      "label": "EQ/FET/amp-heavy render and mix",
      "beforeMedianMs": 3908.08,
      "afterMedianMs": 3957.42,
      "reductionPercent": -1.2625125381261482,
      "beforeRuns": 3,
      "afterRuns": 3,
      "bitExactOutput": true,
      "qualification": "No measured speed gain: candidate was 1.3% slower; one-second outputs match byte for byte. Must accompany any efficiency case study to avoid implying whole-engine gains.",
      "sources": [
        "docs/precision-studio-1.12.0.md",
        "docs/precision-bench-results.json"
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    {
      "label": "Routing normalization source benchmark",
      "beforeMedianMs": 55.339504,
      "afterMedianMs": 9.288321,
      "speedupRatio": 5.957966353015284,
      "iterations": 50,
      "scope": "64 tracks, 16 returns, Linux source benchmark recorded for Studio 1.9.6. This is graph routing normalization, not audio callback or physical latency.",
      "sources": [
        "docs/native-signal-flow-1.9.6.md",
        "docs/native-flow-benchmark.json"
      ]
    },
    {
      "label": "Matched historical hardware DSP load",
      "relativeReductionsPercent": [
        3.68,
        3.75
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      "scope": "Two 0.1.9 six-stage comparison sequences at 48 kHz / 128 samples; two 60-second baseline and two 60-second candidate stages per sequence, 32 EQs, 32 compressors and master retained.",
      "qualification": "Specific provisional repeated comparison, not a statistical certification or cumulative gain. The long 128-sample trials still had timing misses.",
      "source": "benchHistory pages 1,3,5"
    }
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  "performanceMethodology": "Portable C++ compiled with g++ -std=c++17 -O2; medians on the report build host. Percentage reduction = (before - after) / before * 100. Named path results do not establish total-session speed, real-time capacity, device latency, dropout resistance, battery life or performance on another machine.",
  "cannotBeKnownFromRetrievedEvidence": [
    "A complete lifetime count of every compiled or experimental audio-engine build.",
    "A deduplicated lifetime total of unique automated tests across all releases.",
    "Total engineering or listening hours; captured input duration is not development time.",
    "Whether every historical bench iteration corresponds to one of the 19 shipped-binary fingerprints.",
    "Physical Windows/ASIO qualification of the current Engine 1.6.0 across devices and sustained low buffers.",
    "Commercial vendor plugin or original hardware emulation listening qualification.",
    "General real-time capacity or whole-engine speedup inferred from portable fixture timing."
  ]
}