{ "version": 6, "title": "Contour · focused listening", "generatedAt": "2026-10-18T02:17:32.653Z", "sampleRate": 48000, "quality": "high", "internalRate": 384000, "seed": 1234, "normalization": "none for dry leads; context lead stems attenuated to equal full-clip RMS before identical accompaniment is added", "sourceHashes": { "contour-controls.js": "d376d5261c7adfec9372db02ccbbbc741049386987e5699d56383f6b55a25f6c", "contour-engine.js": "5b518e04ea25d9c4f0be9701a92b3d26f9d5c6b29a2d730264cfbb399f545068", "contour-calibrations.js": "97c090fb546507c697ba6ec8758dbddafa891f46cb00617b13789765103260af", "contour-performance.js": "3e1049a7ef37f6cccdd90ad7fadab4dfcf9fc4ad32022a640b6e6652855859a5", "contour-sequences.js": "3eb14fced51b4975d2b949cd03695e91bae8226c839441d0322b844dbdfd7334", "contour-render-worker.js": "b23c4260daadc44903468b1fe04070bab00dc0a4678042260f928b7dc1187b74", "contour-processor.js": "a30861a9091594a7559a063bed42d57d1e6e972f6aa936ebbafe9ae33e7f8849", "voices.js": "00f755e72b99483e595623c6104348badead7bd33107ab5cd8d27da2c1566470", "voice-calibrations.js": "9577ba4e1363bcbc57f44aba566471fcbfd8e4fb939154ee14b3d9e7f9c488b4", "pitch.js": "c77f7b744ce29b4a7975c4b7340b1796e31e24a216abb185f492d4f73658b0d8", "engine.js": "f791cbec1e42b3d17f6b5779599ef3b252c49e45bfcf241aaa827faecc6771b7", "lab-engine.js": "901b26979af443b94d46da240731b6414b551c8890b1b65d175d1e8da1039f63" }, "comparisonPolicy": "Dry lead clips retain fixed engine gain. Optional excerpt matching attenuates the louder region only. Context clips use documented lead-stem attenuation before adding exactly the same accompaniment; whole-mix matching is disabled. Crop edge fades affect audition playback only, never these WAV files.", "limitations": [ "Synthetic instrument model, not recordings of an acoustic clarinet.", "The Breath slider is position within the measured playable range; 50% maps to relative pressure gamma 0.8. It is not a raw pressure percentage.", "Opening calibration is a static tube map at reference breath, not a live pitch servo. Moving controls and other breath settings can move pitch.", "Short and Soft stop include explicit output tapers. Raw physical output is measured separately.", "The inherited backward-Euler solver and legacy contact remain unchanged.", "Accompaniment is a deterministic synthetic C-major fixture, not Phosphor or an external recording.", "Browser and real-device playback are not verified by these renders." ], "groups": [ { "id": "opening-static", "title": "One reed, three openings", "description": "Contour plays the same three fresh notes with a smaller, central, or larger rest opening. Its pressure scale, resonance and damping stay fixed.", "listenFor": "Does the opening give useful changes in character across G3, C4 and G4? Try level matching so a louder opening does not decide the comparison. Focus regions isolate the first G3.", "levelMatchRecommended": true, "matchingNote": "For tone comparisons, match the selected region: only the louder side is attenuated.", "variants": [ { "id": "small", "label": "Smaller opening", "audio": "study006-data/opening-static-small.wav", "audioSha256": "f4a0a0ebdf58b3ed9167fb64f5e88b2e2347eab2520b1206cffc9fe288788005", "durationSeconds": 5.6, "regions": { "attack": { "start": 0.3, "end": 0.8 }, "held": { "start": 0.8, "end": 1.3 }, "release": { "start": 1.3, "end": 1.9 } }, "events": [ { "time": 0.3, "label": "G3 begins", "type": "noteOn" }, { "time": 1.3, "label": "Release", "type": "noteOff" }, { "time": 2, "label": "C4 begins", "type": "noteOn" }, { "time": 3, "label": "Release", "type": "noteOff" }, { "time": 3.7, "label": "G4 begins", "type": "noteOn" }, { "time": 4.7, "label": "Release", "type": "noteOff" } ], "settings": { "voiceId": "contour", "params": { "pressureMode": "playable", "breath": 0.5, "gamma": 0.8, "opening": 0, "bend": 0, "glide": 0.02, "legato": true, "attack": "breath", "release": "soft", "body": "reference" }, "sampleRate": 48000, "quality": "high", "internalRate": 384000, "seed": 1234, "score": { "version": 1, "id": "opening-octave", "name": "G3, C4, G4", "events": [ { "t": 0.3, "type": "noteOn", "note": 55 }, { "t": 1.3, "type": "noteOff" }, { "t": 2, "type": "noteOn", "note": 60 }, { "t": 3, "type": "noteOff" }, { "t": 3.7, "type": "noteOn", "note": 67 }, { "t": 4.7, "type": "noteOff" } ], "duration": 5.6000000000000005, "regions": { "attack": { "start": 0.3, "end": 0.8 }, "held": { "start": 0.8, "end": 1.3 }, "release": { "start": 1.3, "end": 1.9 } } }, "commonNoteBreathEvents": [ { "t": 0.3, "type": "noteOn", "note": 55 }, { "t": 1.3, "type": "noteOff" }, { "t": 2, "type": "noteOn", "note": 60 }, { "t": 3, "type": "noteOff" }, { "t": 3.7, "type": "noteOn", "note": 67 }, { "t": 4.7, "type": "noteOff" } ], "articulation": { "attackSeconds": 0.06, "tonguePeak": 0.35, "tongueRiseSeconds": 0.008, 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ContourTimeline used by the AudioWorklet", "pcm": { "rms": 0.05200120640442868, "rmsDb": -25.67973161626219, "peak": 0.225799560546875, "nonFinite": 0 }, "heldAnalysis": { "rms": 0.06096727093506634, "rmsDb": -24.298064895483485, "peak": 0.224853515625, "nonFinite": 0, "pitchHz": 196.0050451364593, "pitchCents": 0.0647189515652281, "estimatedPitchHz": 196.0050451364593, "pitchConfidence": 0.9978225805522473, "pitchDriftCents": 0.0014091285175089144, "stablePitch": true, "centroidHz": 578.2467342577906, "highFrequencyFraction": 0.0004045298409132387, "oddEvenDb": 17.73370042126861, "contactDuty": null, "closureDuty": null, "flowClosureDuty": null, "contactSteps": null, "closedSteps": null, "flowClosedSteps": null, "internalSteps": null, "faultCount": 0, "clippedSamples": 0, "solverFailures": 0, "mechanicalFailures": 0, "maxSolverResidual": null, "maxMechanicalResidual": null, "state": "periodic" }, "noteMeasurements": [ { "note": 55, "start": 0.8, "end": 1.25, "rms": 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null, "closureDuty": null, "flowClosureDuty": null, "contactSteps": null, "closedSteps": null, "flowClosedSteps": null, "internalSteps": null, "faultCount": 0, "clippedSamples": 0, "solverFailures": 0, "mechanicalFailures": 0, "maxSolverResidual": null, "maxMechanicalResidual": null, "state": "periodic" } ], "rawPreOnset": { "rms": 0, "rmsDb": null, "peak": 0, "nonFinite": 0 }, "outputPreOnset": { "rms": 0, "rmsDb": null, "peak": 0, "nonFinite": 0 }, "rawRelease": { "rms": 0.025327144512577258, "rmsDb": -31.928275432247855, "peak": 0.22484704852104187, "nonFinite": 0 } }, "regionMetrics": { "full": { "rms": 0.05200120640442868, "rmsDb": -25.67973161626219, "peak": 0.225799560546875, "nonFinite": 0 }, "attack": { "rms": 0.05320072571183251, "rmsDb": -25.481648868950664, "peak": 0.224822998046875, "nonFinite": 0 }, "held": { "rms": 0.06096727093506634, "rmsDb": -24.298064895483485, "peak": 0.224853515625, "nonFinite": 0 }, "release": { "rms": 0.01644321132984593, "rmsDb": 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Fixed lead-engine gain; no normalization.", "Breath position 50% maps to gamma 0.8. Opening position 0% scales the rest gap by 0.800.", "Held metrics describe G3 only.", "Soft stop includes an explicit 120 ms output taper; this is not a claim that the raw reed stops in that time." ] }, { "id": "center", "label": "Central opening", "audio": "study006-data/opening-static-center.wav", "audioSha256": "524e92e1cf967b3b8c796b54fa9079f270789ca7ab6e16ec6b30cdd81c0e4fe0", "durationSeconds": 5.6, "regions": { "attack": { "start": 0.3, "end": 0.8 }, "held": { "start": 0.8, "end": 1.3 }, "release": { "start": 1.3, "end": 1.9 } }, "events": [ { "time": 0.3, "label": "G3 begins", "type": "noteOn" }, { "time": 1.3, "label": "Release", "type": "noteOff" }, { "time": 2, "label": "C4 begins", "type": "noteOn" }, { "time": 3, "label": "Release", "type": "noteOff" }, { "time": 3.7, "label": "G4 begins", "type": "noteOn" }, { "time": 4.7, "label": "Release", "type": "noteOff" } ], "settings": { "voiceId": "contour", "params": { "pressureMode": "playable", "breath": 0.5, "gamma": 0.8, 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Fixed lead-engine gain; no normalization.", "Breath position 50% maps to gamma 0.8. Opening position 50% scales the rest gap by 1.000.", "Held covers a changing melody; no single-note pitch metric is assigned.", "Soft stop includes an explicit 120 ms output taper; this is not a claim that the raw reed stops in that time." ] }, { "id": "warm", "label": "Warm · 600 Hz", "audio": "study006-data/output-dry-warm.wav", "audioSha256": "fef1aec61d9a50c9d729d212bc2eb39bf2bce681728d52d340e002022d865cd2", "durationSeconds": 4.9, "regions": { "attack": { "start": 0.3, "end": 0.8 }, "held": { "start": 0.8, "end": 3.9 }, "release": { "start": 3.9, "end": 4.7 } }, "events": [ { "time": 0.3, "label": "G3 begins", "type": "noteOn" }, { "time": 1.2, "label": "C4 begins", "type": "noteOn" }, { "time": 2.1, "label": "E4 begins", "type": "noteOn" }, { "time": 3, "label": "G4 begins", "type": "noteOn" }, { "time": 3.9, "label": "Release", "type": "noteOff" } ], "settings": { "voiceId": "contour", "params": { "pressureMode": "playable", "breath": 0.5, "gamma": 0.8, "opening": 0.5, "bend": 0, "glide": 0.02, "legato": true, "attack": "breath", "release": "soft", "body": "warm" }, "sampleRate": 48000, "quality": "high", "internalRate": 384000, "seed": 1234, "score": { "version": 1, "id": "contour-phrase", "name": "G3, C4, E4, G4 connected", "events": [ { "t": 0.3, "type": "noteOn", "note": 55 }, { "t": 1.2, "type": "noteOn", "note": 60 }, { "t": 2.1, "type": "noteOn", "note": 64 }, { "t": 3, "type": "noteOn", "note": 67 }, { "t": 3.9, "type": "noteOff" } ], "duration": 4.9, "regions": { "attack": { "start": 0.3, "end": 0.8 }, "held": { "start": 0.8, "end": 3.9 }, "release": { "start": 3.9, "end": 4.7 } } }, "commonNoteBreathEvents": [ { "t": 0.3, "type": "noteOn", "note": 55 }, { "t": 1.2, "type": "noteOn", "note": 60 }, { "t": 2.1, "type": "noteOn", "note": 64 }, { "t": 3, "type": "noteOn", "note": 67 }, { "t": 3.9, "type": "noteOff" } ], "articulation": { "attackSeconds": 0.06, "tonguePeak": 0.35, "tongueRiseSeconds": 0.008, "tongueReleaseSeconds": 0.055, 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67, "currentNote": 67, "targetHz": 391.99543598174927, "tubeHz": 422.52381042097505, "actualGamma": 0, "gammaTarget": 0.8, "pressureMode": "playable", "breath": 0.5, "opening": 0.5, "openingTarget": 0.5, "tongueTarget": 0, "outputGain": 0, "rawSample": 0, "rawPeak": 0.2976075934514787, "gliding": false, "params": { "pressureMode": "playable", "breath": 0.5, "gamma": 0.8, "opening": 0.5, "bend": 0, "glide": 0.02, "legato": true, "attack": "breath", "release": "soft", "body": "warm" } }, "peak": 0.2976075934514787, "rawPeak": 0.2976075934514787, "rms": 0.09018301268687508, "maxStep": 0.04596836391223147, "faults": 0, "safetyHits": 0, "solverFailures": 0, "clippedSamples": 0, "normalization": "none", "finalStage": "idle", "releaseOutput": "Short uses a 60 ms output fade; Soft uses a 120 ms fade plus 50 ms pressure hold and 110 ms pressure fall; Breath uses 340 ms pressure fall without output fade. rawSamples precede finishing gain", "runtime": "same ContourPerformance and ContourTimeline 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Fixed lead-engine gain; no normalization.", "Breath position 50% maps to gamma 0.8. Opening position 50% scales the rest gap by 1.000.", "Held covers a changing melody; no single-note pitch metric is assigned.", "Soft stop includes an explicit 120 ms output taper; this is not a claim that the raw reed stops in that time." ] } ] }, { "id": "output-context", "title": "Hear the lower weight in a small mix", "description": "The same phrase sits over a quiet synthetic C-major chord and bass. Lead stems are level-matched before the identical backing is added.", "listenFor": "Does Warm still help the reed hold its place, or does Reference leave a better fit? This backing is a simple context fixture, not Phosphor.", "levelMatchRecommended": false, "disableMatching": true, "matchingNote": "Already matched at the lead-stem level using attenuation only. 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No external recording; not Phosphor.", "sampleRate": 48000, "durationSeconds": 4.9, "onset": 0.3, "gateOff": 3.9, "attackSeconds": 0.14, "releaseSeconds": 0.3, "voices": [ { "note": 48, "amplitude": 0.35, "phase": 0, "harmonics": [ 1, 0.12 ] }, { "note": 52, "amplitude": 0.27, "phase": 0.4, "harmonics": [ 1, 0.12 ] }, { "note": 55, "amplitude": 0.23, "phase": 0.8, "harmonics": [ 1, 0.12 ] }, { "note": 36, "amplitude": 0.2, "phase": 1.2, "harmonics": [ 1, 0.18 ] } ], "envelope": "sin(pi/2 * min(age/attack,1)) squared; after gateOff multiply cos(pi/2 * min(releaseAge/release,1)) squared", "targetFullClipRmsRelativeToMatchedLead": 0.35 }, "backingGeneratorGain": 0.06842850879444963, "backingRms": 0.02288182525946544, "backingGainInMix": 1, "commonMasterGain": 1, "formula": "PCM16Encode(commonMasterGain * (leadGain * decodedLead + decodedBacking))", "decoding": "Signed 16-bit PCM / 32768", "encoding": "round(x * 32768) for negative samples; round(x * 32767) for nonnegative samples", "quantizationMaximumAbsoluteError": 0.000030517578125, "normalization": "No whole-mix normalization; commonMasterGain is shared attenuation only if peak headroom requires it." } }, "metrics": { "sampleRate": 48000, "frames": 235200, "duration": 4.9, "voiceId": "contour", "quality": "high", "seed": 1234, "initialParams": { "pressureMode": "playable", "breath": 0.5, "gamma": 0.8, "opening": 0.5, "bend": 0, "glide": 0.02, "legato": true, "attack": "breath", "release": "soft", "body": "reference" }, "params": { "pressureMode": "playable", "breath": 0.5, "gamma": 0.8, "opening": 0.5, "bend": 0, "glide": 0.02, "legato": true, "attack": "breath", "release": "soft", "body": "reference" }, "initialTelemetry": { "gap": 1, "reed": 0, "reedVelocity": 0, "pressureIn": 0, "pressure": 0, "mouthPressure": 0, "flow": 0, "contact": 0, "reedHz": 0, "closingPressure": 0, "sample": 0, "rms": 0, "peak": 0, "faults": 0, "safetyHits": 0, "solverResidual": 0, "solverFailures": 0, "mechanicalFailures": 0, "maxMechanicalResidual": 0, "voiceId": "contour", "quality": "high", "internalRate": 384000, "gamma": 0, "targetGamma": 0, "currentOpening": 0.5, "targetOpening": 0.5, "openingScale": 1, "h0": 0.0004186, "zeta": 0.4962570293301931, "dampingRatio": 0.286, "body": "reference", "radiationCutoffHz": 950, "stage": "idle", "held": false, "note": 55, "targetNote": 55, "currentNote": 55, "targetHz": 195.99771799087463, "tubeHz": 203.3713513612355, "actualGamma": 0, "gammaTarget": 0.8, "pressureMode": "playable", "breath": 0.5, "opening": 0.5, "openingTarget": 0.5, "tongueTarget": 0, "outputGain": 0, "rawSample": 0, "rawPeak": 0, "gliding": false, "params": { "pressureMode": "playable", "breath": 0.5, "gamma": 0.8, "opening": 0.5, "bend": 0, "glide": 0.02, "legato": true, "attack": "breath", "release": "soft", "body": "reference" } }, "finalTelemetry": { "gap": 1, "reed": 0, "reedVelocity": 0, "pressureIn": 0, "pressure": 0, "mouthPressure": 0, "flow": 0, "contact": 0, "reedHz": 0, "closingPressure": 0, "sample": 0, "rms": 0, "peak": 0.24782917462378104, "faults": 0, "safetyHits": 0, "solverResidual": 0, "solverFailures": 0, "mechanicalFailures": 0, "maxMechanicalResidual": 0, "voiceId": "contour", "quality": "high", "internalRate": 384000, "gamma": 0, "targetGamma": 0, "currentOpening": 0.5, "targetOpening": 0.5, "openingScale": 1, "h0": 0.0004186, "zeta": 0.4962570293301931, "dampingRatio": 0.286, "body": "reference", "radiationCutoffHz": 950, "stage": "idle", "held": false, "note": 67, "targetNote": 67, "currentNote": 67, "targetHz": 391.99543598174927, "tubeHz": 422.52381042097505, "actualGamma": 0, "gammaTarget": 0.8, "pressureMode": "playable", "breath": 0.5, "opening": 0.5, "openingTarget": 0.5, "tongueTarget": 0, "outputGain": 0, "rawSample": 0, "rawPeak": 0.24782917462378104, "gliding": false, "params": { "pressureMode": "playable", "breath": 0.5, "gamma": 0.8, "opening": 0.5, "bend": 0, "glide": 0.02, "legato": true, "attack": "breath", "release": "soft", "body": "reference" } }, "peak": 0.24782917462378104, "rawPeak": 0.24782917462378104, "rms": 0.06537864700082499, "maxStep": 0.03946354518544698, "faults": 0, "safetyHits": 0, "solverFailures": 0, "clippedSamples": 0, "normalization": "none", "finalStage": "idle", "releaseOutput": "Short uses a 60 ms output fade; Soft uses a 120 ms fade plus 50 ms pressure hold and 110 ms pressure fall; Breath uses 340 ms pressure fall without output fade. rawSamples precede finishing gain", "runtime": "same ContourPerformance and ContourTimeline used by the AudioWorklet", "pcm": { "rms": 0.06982991697221483, "rmsDb": -23.119169486698038, "peak": 0.3023681640625, "nonFinite": 0 }, "heldAnalysis": null, "noteMeasurements": null, "rawPreOnset": { "rms": 0, "rmsDb": null, "peak": 0, "nonFinite": 0 }, "outputPreOnset": { "rms": 0, "rmsDb": null, "peak": 0, "nonFinite": 0 }, "rawRelease": { "rms": 0.031575723110132375, "rmsDb": -30.01293389913, "peak": 0.24406543374061584, "nonFinite": 0 }, "leadEngineStats": { "sampleRate": 48000, "frames": 235200, "duration": 4.9, "voiceId": "contour", "quality": "high", "seed": 1234, "initialParams": { "pressureMode": "playable", "breath": 0.5, "gamma": 0.8, "opening": 0.5, "bend": 0, "glide": 0.02, "legato": true, "attack": "breath", "release": "soft", "body": "reference" }, "params": { "pressureMode": "playable", "breath": 0.5, "gamma": 0.8, "opening": 0.5, "bend": 0, "glide": 0.02, "legato": true, "attack": "breath", "release": "soft", "body": "reference" }, "initialTelemetry": { "gap": 1, "reed": 0, "reedVelocity": 0, "pressureIn": 0, "pressure": 0, "mouthPressure": 0, "flow": 0, "contact": 0, "reedHz": 0, "closingPressure": 0, "sample": 0, "rms": 0, "peak": 0, "faults": 0, "safetyHits": 0, "solverResidual": 0, "solverFailures": 0, "mechanicalFailures": 0, "maxMechanicalResidual": 0, "voiceId": "contour", "quality": "high", "internalRate": 384000, "gamma": 0, "targetGamma": 0, "currentOpening": 0.5, "targetOpening": 0.5, "openingScale": 1, "h0": 0.0004186, "zeta": 0.4962570293301931, "dampingRatio": 0.286, "body": "reference", "radiationCutoffHz": 950, "stage": "idle", "held": false, "note": 55, "targetNote": 55, "currentNote": 55, "targetHz": 195.99771799087463, "tubeHz": 203.3713513612355, "actualGamma": 0, "gammaTarget": 0.8, "pressureMode": "playable", "breath": 0.5, "opening": 0.5, "openingTarget": 0.5, "tongueTarget": 0, "outputGain": 0, "rawSample": 0, "rawPeak": 0, "gliding": false, "params": { "pressureMode": "playable", "breath": 0.5, "gamma": 0.8, "opening": 0.5, "bend": 0, "glide": 0.02, "legato": true, "attack": "breath", "release": "soft", "body": "reference" } }, "finalTelemetry": { "gap": 1, "reed": 0, "reedVelocity": 0, "pressureIn": 0, "pressure": 0, "mouthPressure": 0, "flow": 0, "contact": 0, "reedHz": 0, "closingPressure": 0, "sample": 0, "rms": 0, "peak": 0.24782917462378104, "faults": 0, "safetyHits": 0, "solverResidual": 0, "solverFailures": 0, "mechanicalFailures": 0, "maxMechanicalResidual": 0, "voiceId": "contour", "quality": "high", "internalRate": 384000, "gamma": 0, "targetGamma": 0, "currentOpening": 0.5, "targetOpening": 0.5, "openingScale": 1, "h0": 0.0004186, "zeta": 0.4962570293301931, "dampingRatio": 0.286, "body": "reference", "radiationCutoffHz": 950, "stage": "idle", "held": false, "note": 67, "targetNote": 67, "currentNote": 67, "targetHz": 391.99543598174927, "tubeHz": 422.52381042097505, "actualGamma": 0, "gammaTarget": 0.8, "pressureMode": "playable", "breath": 0.5, "opening": 0.5, "openingTarget": 0.5, "tongueTarget": 0, "outputGain": 0, "rawSample": 0, "rawPeak": 0.24782917462378104, "gliding": false, "params": { "pressureMode": "playable", "breath": 0.5, "gamma": 0.8, "opening": 0.5, "bend": 0, "glide": 0.02, "legato": true, "attack": "breath", "release": "soft", "body": "reference" } }, "peak": 0.24782917462378104, "rawPeak": 0.24782917462378104, "rms": 0.06537864700082499, "maxStep": 0.03946354518544698, "faults": 0, "safetyHits": 0, "solverFailures": 0, "clippedSamples": 0, "normalization": "none", "finalStage": "idle", "releaseOutput": "Short uses a 60 ms output fade; 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The same backing samples and master gain are used on both sides.", "Dry lead stems were RMS-matched by attenuation before the backing was added. 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