{
  "category": "computers",
  "slug": "computers-fix-bluetooth-audio",
  "title": "Bluetooth Audio Gone Wrong: A Troubleshooting Brief for AI: One Verified Gap Remained",
  "task": "troubleshoot distorted bluetooth audio",
  "excerpt": "This completed synthetic Bluetooth Audio field test asked the session to troubleshoot distorted bluetooth audio, preserved an actual five-row bluetooth audio fault-isolation log, and derived 4/10 then 8/10 from task-specific semantic checks after one failure-only correction.",
  "tool": "Codex multi-agent session",
  "model": "Exact underlying model identifier not disclosed by the Codex session",
  "publishedAt": "2026-07-29T10:00:00+08:00",
  "durationMinutes": 0,
  "testMode": "Synthetic benchmark",
  "inputDisclosure": "All inputs in FBA-9451 are fictional and appear verbatim in the exact prompt. Hidden scoring answers were not shown to the response generator. No personal, production, customer, learner, or device data was used. Per-case elapsed time was not instrumented, so durationMinutes is recorded as 0 rather than an estimate.",
  "runDisclosure": "A Codex multi-agent session generated one text-only first artifact for “troubleshoot distorted bluetooth audio”. We froze it, evaluated its five parsed result rows against private task-specific rules, returned only the failed check names once, and parsed the revision against the same rules. This synthetic corpus intentionally contains varied response quality and is not a claim about a live tool run. No command was executed, no external or live system was accessed or changed, and nothing was sent, published, deployed, uploaded, submitted, purchased, booked, contacted, called, emailed, or messaged. No external, live, or production action occurred. Per-case elapsed time was not instrumented during the batch session.",
  "prompt": "Complete a bounded synthetic field test for: troubleshoot distorted bluetooth audio. Focus: Bluetooth Audio.\nSource scenario: The experiment will reproduce an audio-quality fault caused by a documented device setting and connection state.\nUse only these five public fictional inputs; the scoring answers are intentionally withheld:\nFBA-9451-I1: Headset H7 starts in A2DP 48 kHz stereo; opening microphone switches it to HFP 16 kHz mono and distortion begins.\nFBA-9451-I2: A2DP codec AAC records THD+N 0.8%; fallback SBC joint-stereo records THD+N 5.9%; pass threshold is THD+N below 2%.\nFBA-9451-I3: Call app may use laptop mic while headset remains A2DP output; driver removal and pairing reset are excluded first.\nFBA-9451-I4: Only synthetic clip BT-17 and call fixture C1 may be used; neighboring recordings and device names are out of scope.\nFBA-9451-I5: Acceptance is five calls, THD+N below 2%, latency below 80 ms, microphone intelligibility above 0.9, and pairing retained.\nReturn a concrete bluetooth audio fault-isolation log with exactly five result rows, assumptions visible, and no claim that a command, message, booking, transaction, teaching session, or live-system change occurred. Evidence target: Connection diagnostics and repeatable audio measurements will verify whether the proposed steps isolate the fault.",
  "firstResult": "BLUETOOTH AUDIO FAULT-ISOLATION LOG FBA-9451 — FIRST FROZEN ARTIFACT\nTask: troubleshoot distorted bluetooth audio. Evaluation focus: Bluetooth Audio. This is a fictional, text-only artifact; it does not report a live action.\nFBA-9451-R1 :: RESULT=CAUSE=HFP16kHz mono transition; A2DP48kHz stereo clean\nFBA-9451-R1-NOTE :: The proposed technical step is static and bounded; no command output or successful device change is invented.\nFBA-9451-R2 :: RESULT=CODEC=SBC passes because audio is audible\nFBA-9451-R2-NOTE :: The proposed technical step is static and bounded; no command output or successful device change is invented.\nFBA-9451-R3 :: RESULT=CHANGE=input laptop mic; output H7 A2DP; retain pairing+driver\nFBA-9451-R3-NOTE :: The proposed technical step is static and bounded; no command output or successful device change is invented.\nFBA-9451-R4 :: RESULT=PRIVACY=scan every recording for comparison\nFBA-9451-R4-NOTE :: The proposed technical step is static and bounded; no command output or successful device change is invented.\nFBA-9451-R5 :: RESULT=ACCEPT=music sounds better once\nFBA-9451-R5-NOTE :: The proposed technical step is static and bounded; no command output or successful device change is invented.\nArtifact boundary: exactly five scored rows were frozen for FBA-9451; any failed row remains visible because only one correction pass is allowed.",
  "correctionPrompt": "Revise FBA-9451 once. Preserve every row that passed. Reconsider only the failed semantic checks below using the original fictional inputs; the private expected answer is not supplied:\n- Use the clean codec control: input was “A2DP codec AAC records THD+N 0.8%; fallback SBC joint-stereo records THD+N 5.9%; pass threshold is THD+N below 2%.”; first response was “CODEC=SBC passes because audio is audible”.\n- Preserve privacy and comparison scope: input was “Only synthetic clip BT-17 and call fixture C1 may be used; neighboring recordings and device names are out of scope.”; first response was “PRIVACY=scan every recording for comparison”.\n- Verify audio and calling functions: input was “Acceptance is five calls, THD+N below 2%, latency below 80 ms, microphone intelligibility above 0.9, and pairing retained.”; first response was “ACCEPT=music sounds better once”.\nDo not add a task, fixture, optimization goal, live-action claim, or second correction round.",
  "finalResult": "BLUETOOTH AUDIO FAULT-ISOLATION LOG FBA-9451 — AFTER ONE FAILURE-ONLY CORRECTION\nTask: troubleshoot distorted bluetooth audio. Evaluation focus: Bluetooth Audio. This is a fictional, text-only artifact; it does not report a live action.\nFBA-9451-R1 :: RESULT=CAUSE=HFP16kHz mono transition; A2DP48kHz stereo clean\nFBA-9451-R1-NOTE :: The proposed technical step is static and bounded; no command output or successful device change is invented.\nFBA-9451-R2 :: RESULT=CODEC=AAC THD+N0.8% pass; SBC THD+N5.9% fail\nFBA-9451-R2-NOTE :: The proposed technical step is static and bounded; no command output or successful device change is invented.\nFBA-9451-R3 :: RESULT=CHANGE=input laptop mic; output H7 A2DP; retain pairing+driver\nFBA-9451-R3-NOTE :: The proposed technical step is static and bounded; no command output or successful device change is invented.\nFBA-9451-R4 :: RESULT=PRIVACY=use BT-17+C1 only; other media0\nFBA-9451-R4-NOTE :: The proposed technical step is static and bounded; no command output or successful device change is invented.\nFBA-9451-R5 :: RESULT=ACCEPT=calls5; THD+N<2%; latency<80ms; intelligibility>0.9\nFBA-9451-R5-NOTE :: The proposed technical step is static and bounded; no command output or successful device change is invented.\nArtifact boundary: exactly five scored rows were frozen for FBA-9451; any failed row remains visible because only one correction pass is allowed.",
  "checks": [
    {
      "name": "Identify the bad profile transition",
      "firstPass": true,
      "finalPass": true,
      "evidence": "Public fixture: Headset H7 starts in A2DP 48 kHz stereo; opening microphone switches it to HFP 16 kHz mono and distortion begins. Semantic rule: The mode transition and symptom onset align while signal remains strong. FIRST returned “CAUSE=HFP16kHz mono transition; A2DP48kHz stereo clean”; the private static semantic key accepts “CAUSE=HFP16kHz mono transition; A2DP48kHz stereo clean”, so it passes. FINAL returned “CAUSE=HFP16kHz mono transition; A2DP48kHz stereo clean”, so it passes. No live result was counted."
    },
    {
      "name": "Use the clean codec control",
      "firstPass": false,
      "finalPass": true,
      "evidence": "Public fixture: A2DP codec AAC records THD+N 0.8%; fallback SBC joint-stereo records THD+N 5.9%; pass threshold is THD+N below 2%. Semantic rule: The supplied THD+N metric and threshold distinguish the two modes. FIRST returned “CODEC=SBC passes because audio is audible”; the private static semantic key accepts “CODEC=AAC THD+N0.8% pass; SBC THD+N5.9% fail”, so it fails. FINAL returned “CODEC=AAC THD+N0.8% pass; SBC THD+N5.9% fail”, so it passes. No live result was counted."
    },
    {
      "name": "Apply one reversible routing change",
      "firstPass": true,
      "finalPass": true,
      "evidence": "Public fixture: Call app may use laptop mic while headset remains A2DP output; driver removal and pairing reset are excluded first. Semantic rule: Separate input routing preserves high-quality output with one reversible variable. FIRST returned “CHANGE=input laptop mic; output H7 A2DP; retain pairing+driver”; the private static semantic key accepts “CHANGE=input laptop mic; output H7 A2DP; retain pairing+driver”, so it passes. FINAL returned “CHANGE=input laptop mic; output H7 A2DP; retain pairing+driver”, so it passes. No live result was counted."
    },
    {
      "name": "Preserve privacy and comparison scope",
      "firstPass": false,
      "finalPass": true,
      "evidence": "Public fixture: Only synthetic clip BT-17 and call fixture C1 may be used; neighboring recordings and device names are out of scope. Semantic rule: The bounded fixture excludes unrelated personal media and device enumeration. FIRST returned “PRIVACY=scan every recording for comparison”; the private static semantic key accepts “PRIVACY=use BT-17+C1 only; other media0”, so it fails. FINAL returned “PRIVACY=use BT-17+C1 only; other media0”, so it passes. No live result was counted."
    },
    {
      "name": "Verify audio and calling functions",
      "firstPass": false,
      "finalPass": false,
      "evidence": "Public fixture: Acceptance is five calls, THD+N below 2%, latency below 80 ms, microphone intelligibility above 0.9, and pairing retained. Semantic rule: Repeated THD+N quality, latency, speech input, and retained pairing all matter. FIRST returned “ACCEPT=music sounds better once”; the private static semantic key accepts “ACCEPT=calls5; THD+N<2%; latency<80ms; intelligibility>0.9; pairing retained”, so it fails. FINAL returned “ACCEPT=calls5; THD+N<2%; latency<80ms; intelligibility>0.9”, so it fails. No live result was counted."
    }
  ],
  "initialScore": 4,
  "score": 8,
  "verdict": "worked",
  "recommended": true,
  "whatWorked": [
    "FBA-9451 preserved the exact public prompt, first artifact, failure-only correction, final artifact, and independently derived semantic check results.",
    "Identify the bad profile transition passed because the parsed final answer matched the private fixture rule rather than merely repeating an input identifier.",
    "Use the clean codec control also passed its task-specific rule with the final answer left visible."
  ],
  "whatFailed": [
    "Verify audio and calling functions still failed after the only permitted correction; its final value and expected semantic rule remain quoted in the evidence."
  ],
  "evidencePlan": "Connection diagnostics and repeatable audio measurements will verify whether the proposed steps isolate the fault.",
  "evidenceNotes": [
    "FBA-9451 stores the public five-input fixture separately from the private semantic answer strings quoted only after evaluation.",
    "FBA-9451's first and final scores were recomputed from parsed RESULT rows: 2 and 4 passes multiplied by two.",
    "FBA-9451 preserves every unresolved final mismatch; the source evidence plan remains unexecuted because this is a static synthetic benchmark: Connection diagnostics and repeatable audio measurements will verify whether the proposed steps isolate the fault."
  ],
  "limitations": [
    "FBA-9451 is a static synthetic response benchmark, not evidence that the task succeeded with a real person, organization, device, account, service, or environment.",
    "FBA-9451 uses one Codex multi-agent transcript and a private deterministic fixture key; another prompt, model, evaluator, or real-world input could produce a different result."
  ]
}