{ "schema": 1, "language": "en", "lang_code": "a", "dialect": "us", "voice": "af_river", "speed": 0.88, "sample_rate": 24000, "total_duration": 38.66, "media_sha256": "a32c1a5cfc63b7b308beeae332ae79a6e833dd1c87d64eb7be47051d4525885c", "media_bytes": 249335, "render_fingerprint": "9d1793ec1caf8883514c44e8195e11b77c989b5cb7fbf4262bdf31c1397abf4e", "render_inputs": { "renderer": "render_all_voices-v4", "lesson": "39_classifier_evaluation", "language": "en", "lang_code": "a", "dialect": "us", "voice": "af_river", "speed": 0.88, "scenes": [ { "narration": "This tutorial covers Classifier Evaluation. Audit held-out predictions, nested cross-validation, calibration, leakage, and per-plate performance.", "speech_text": [ "This tutorial covers [Classifier](/klˈæsəfIəɹ/) Evaluation.", "Audit held-out predictions, nested cross-validation, calibration, leakage, and per-plate performance." ], "authored_hold": 0.45, "resolved_hold": 0.45, "speed_multiplier": 1.0, "effective_speed": 0.88 }, { "narration": "Choose predictions with ground truth, split metadata, plate identifiers, probabilities, and model-run records.", "speech_text": [ "Choose predictions with ground truth, split metadata, plate identifiers, probabilities, and model-run records." ], "authored_hold": 0.45, "resolved_hold": 0.45, "speed_multiplier": 1.0, "effective_speed": 0.88 }, { "narration": "In the main configuration area, configure class order, thresholds, calibration bins, grouping, bootstrap uncertainty, and leakage checks.", "speech_text": [ "In the main configuration area, configure class order, thresholds, calibration bins, grouping, bootstrap uncertainty, and leakage checks." ], "authored_hold": 0.45, "resolved_hold": 0.45, "speed_multiplier": 1.0, "effective_speed": 0.88 }, { "narration": "Evaluate held-out and per-plate behavior before using a classifier for biological conclusions.", "speech_text": [ "Evaluate held-out and per-plate behavior before using a [classifier](/klˈæsəfIəɹ/) for biological conclusions." ], "authored_hold": 0.45, "resolved_hold": 0.45, "speed_multiplier": 1.0, "effective_speed": 0.88 }, { "narration": "When the workflow finishes, spaCR produces discrimination, calibration, confusion, leakage, and robustness reports.", "speech_text": [ "When the workflow finishes, spacer produces discrimination, calibration, confusion, leakage, and robustness reports." ], "authored_hold": 0.65, "resolved_hold": 0.52, "speed_multiplier": 1.0, "effective_speed": 0.88 } ], "assembly": { "version": "2026-08-11-natural-sentences-v1", "sample_rate": 24000, "lead_silence_seconds": 0.1, "tail_silence_seconds": 0.18, "sentence_pause_seconds": 0.12, "scene_hold_min_seconds": 0.32, "scene_hold_max_seconds": 0.52, "default_scene_hold_seconds": 0.42, "vad_frame_seconds": 0.005, "vad_peak_ratio": 0.002, "vad_absolute_floor": 2e-05 }, "cadence_profile": { "version": "2026-08-11-af-heart-scene-cadence-v6", "sha256": "4d728d67e73eea7e6203878879992f9050ae4a2677d717efdd68545104eb7812", "bytes": 23008, "enabled": false, "targets": { "slow_wpm": 125.0, "fast_wpm": 145.0, "calibration_wpm": 150.0 }, "safe_multiplier_bounds": { "minimum": 0.68, "maximum": 1.18 } }, "mastering": { "filters": [ "loudnorm=I=-16:TP=-3:LRA=11", "loudnorm=I=-16:TP=-5:LRA=11,alimiter=limit=0.7:attack=5:release=50:level=disabled", "loudnorm=I=-16:TP=-5:LRA=11,alimiter=limit=0.5:attack=5:release=50:level=disabled" ], "codec": "aac", "bitrate": "48k", "channels": 1, "maximum_decoded_true_peak_dbfs": -1.0 }, "pronunciation": { "role": "pronunciation_profile", "version": "2026-08-11-en-natural-v6", "sha256": "1fbaa615cfa904094bdef5cba963539f0e8bec5927192a76b0d503e90c4bb83e", "bytes": 13263 }, "synthesis_runtime": { "model": { "repository": "hexgrad/Kokoro-82M", "snapshot": "f3ff3571791e39611d31c381e3a41a3af07b4987", "config": { "role": "kokoro_config", "name": "14a726edd3718279eac426630879ff743955b16a", "bytes": 2351, "sha256": "5abb01e2403b072bf03d04fde160443e209d7a0dad49a423be15196b9b43c17f" }, "weights": { "role": "kokoro_weights", "name": "496dba118d1a58f5f3db2efc88dbdc216e0483fc89fe6e47ee1f2c53f18ad1e4", "bytes": 327212226, "sha256": "496dba118d1a58f5f3db2efc88dbdc216e0483fc89fe6e47ee1f2c53f18ad1e4" } }, "voice_pack": { "role": "kokoro_voice_pack", "name": "e149459bd9c084416b74756b9bd3418256a8b839088abb07d463730c369dab8f", "bytes": 523425, "sha256": "e149459bd9c084416b74756b9bd3418256a8b839088abb07d463730c369dab8f", "tensor_sha256": "00a2bcf82b1d86e8f19902ede58c65ccf6c0e43b44b7d74fad54e5d8933c9c30", "loaded_tensor_sha256": "00a2bcf82b1d86e8f19902ede58c65ccf6c0e43b44b7d74fad54e5d8933c9c30" }, "software": { "kokoro": "0.9.4", "misaki": "0.9.4", "torch": "2.6.0", "soundfile": "0.14.0", "python": "3.12.4", "implementation": "cpython" }, "inference": { "device": "cuda" }, "mastering_tool": { "version": "ffmpeg version 6.1.1-3ubuntu5+esm10 Copyright (c) 2000-2023 the FFmpeg developers", "version_output_sha256": "92dfb2468e6f5f06919b5433c0f14459ac19b81b1bc2d9fdceb83c6ad42e37b5", "executable": { "role": "ffmpeg_executable", "name": "ffmpeg", "bytes": 342488, "sha256": "ad63ef3f2f18fa92e89f0ec2bde6941e81f83724c8d265414cb659c28077392d" } } } }, "scenes": [ { "scene": 1, "speech_start": 0.0, "speech_end": 9.24, "scene_end": 9.69, "duration": 9.69, "text": "This tutorial covers Classifier Evaluation. Audit held-out predictions, nested cross-validation, calibration, leakage, and per-plate performance.", "speech_text": "This tutorial covers [Classifier](/klˈæsəfIəɹ/) Evaluation. Audit held-out predictions, nested cross-validation, calibration, leakage, and per-plate performance.", "phonemes": "ðˌɪs tutˈɔɹiəl kˈʌvəɹz klˈæsəfIəɹ əvˌæljʊˈAʃən. ˈɔdət hˈɛldˌWt pɹidˈɪkʃənz, nˈɛstᵻd kɹˌɔsvˌælɪdˈAʃən, kˌæləbɹˈAʃən, lˈikɪʤ, ænd pɜɹplˈAt pəɹfˈɔɹməns.", "authored_hold_after": 0.45, "hold_after": 0.45, "base_speed": 0.88, "speed_multiplier": 1.0, "effective_speed": 0.88, "sentences": [ { "sentence": 1, "speech_start": 0.0, "speech_end": 3.28, "audible_start": 0.1, "audible_end": 3.1, "duration": 3.28, "gap_from_previous": null, "trimmed_lead": 0.145, "trimmed_tail": 0.425, "text": "This tutorial covers Classifier Evaluation.", "speech_text": "This tutorial covers [Classifier](/klˈæsəfIəɹ/) Evaluation.", "phonemes": "ðˌɪs tutˈɔɹiəl kˈʌvəɹz klˈæsəfIəɹ əvˌæljʊˈAʃən." }, { "sentence": 2, "speech_start": 3.4, "speech_end": 9.24, "audible_start": 3.5, "audible_end": 9.06, "duration": 5.84, "gap_from_previous": 0.4, "trimmed_lead": 0.18, "trimmed_tail": 0.405, "text": "Audit held-out predictions, nested cross-validation, calibration, leakage, and per-plate performance.", "speech_text": "Audit held-out predictions, nested cross-validation, calibration, leakage, and per-plate performance.", "phonemes": "ˈɔdət hˈɛldˌWt pɹidˈɪkʃənz, nˈɛstᵻd kɹˌɔsvˌælɪdˈAʃən, kˌæləbɹˈAʃən, lˈikɪʤ, ænd pɜɹplˈAt pəɹfˈɔɹməns." } ] }, { "scene": 2, "speech_start": 9.69, "speech_end": 16.134999999999998, "scene_end": 16.584999999999997, "duration": 6.894999999999998, "text": "Choose predictions with ground truth, split metadata, plate identifiers, probabilities, and model-run records.", "speech_text": "Choose predictions with ground truth, split metadata, plate identifiers, probabilities, and model-run records.", "phonemes": "ʧˈuz pɹidˈɪkʃənz wɪð ɡɹˈWnd tɹˈuθ, splˈɪt mˈɛTədˌATə, plˈAt IdˈɛntəfˌIəɹz, pɹˌɑbəbˈɪləTiz, ænd mˈɑdᵊlɹˌʌn ɹˈɛkəɹdz.", "authored_hold_after": 0.45, "hold_after": 0.45, "base_speed": 0.88, "speed_multiplier": 1.0, "effective_speed": 0.88, "sentences": [ { "sentence": 1, "speech_start": 9.69, "speech_end": 16.134999999999998, "audible_start": 9.79, "audible_end": 15.954999999999998, "duration": 6.445, "gap_from_previous": null, "trimmed_lead": 0.155, "trimmed_tail": 0.4, "text": "Choose predictions with ground truth, split metadata, plate identifiers, probabilities, and model-run records.", "speech_text": "Choose predictions with ground truth, split metadata, plate identifiers, probabilities, and model-run records.", "phonemes": "ʧˈuz pɹidˈɪkʃənz wɪð ɡɹˈWnd tɹˈuθ, splˈɪt mˈɛTədˌATə, plˈAt IdˈɛntəfˌIəɹz, pɹˌɑbəbˈɪləTiz, ænd mˈɑdᵊlɹˌʌn ɹˈɛkəɹdz." } ] }, { "scene": 3, "speech_start": 16.584999999999997, "speech_end": 24.424999999999997, "scene_end": 24.874999999999996, "duration": 8.29, "text": "In the main configuration area, configure class order, thresholds, calibration bins, grouping, bootstrap uncertainty, and leakage checks.", "speech_text": "In the main configuration area, configure class order, thresholds, calibration bins, grouping, bootstrap uncertainty, and leakage checks.", "phonemes": "ɪn ðə mˈAn kənfˌɪɡjəɹˈAʃən ˈɛɹiə, kənfˈɪɡjəɹ klˈæs ˈɔɹdəɹ, θɹˈɛʃhˌOldz, kˌæləbɹˈAʃən bˈɪnz, ɡɹˈupɪŋ, bˈutstɹˌæp ˌʌnsˈɜɹtᵊnti, ænd lˈikɪʤ ʧˈɛks.", "authored_hold_after": 0.45, "hold_after": 0.45, "base_speed": 0.88, "speed_multiplier": 1.0, "effective_speed": 0.88, "sentences": [ { "sentence": 1, "speech_start": 16.584999999999997, "speech_end": 24.424999999999997, "audible_start": 16.685, "audible_end": 24.244999999999997, "duration": 7.84, "gap_from_previous": null, "trimmed_lead": 0.185, "trimmed_tail": 0.4, "text": "In the main configuration area, configure class order, thresholds, calibration bins, grouping, bootstrap uncertainty, and leakage checks.", "speech_text": "In the main configuration area, configure class order, thresholds, calibration bins, grouping, bootstrap uncertainty, and leakage checks.", "phonemes": "ɪn ðə mˈAn kənfˌɪɡjəɹˈAʃən ˈɛɹiə, kənfˈɪɡjəɹ klˈæs ˈɔɹdəɹ, θɹˈɛʃhˌOldz, kˌæləbɹˈAʃən bˈɪnz, ɡɹˈupɪŋ, bˈutstɹˌæp ˌʌnsˈɜɹtᵊnti, ænd lˈikɪʤ ʧˈɛks." } ] }, { "scene": 4, "speech_start": 24.874999999999996, "speech_end": 30.58, "scene_end": 31.029999999999998, "duration": 6.155000000000001, "text": "Evaluate held-out and per-plate behavior before using a classifier for biological conclusions.", "speech_text": "Evaluate held-out and per-plate behavior before using a [classifier](/klˈæsəfIəɹ/) for biological conclusions.", "phonemes": "əvˈæljʊˌAt hˈɛldˌWt ænd pɜɹplˈAt bəhˈAvjəɹ bəfˈɔɹ jˈuzɪŋ ɐ klˈæsəfIəɹ fɔɹ bˌIəlˈɑʤəkᵊl kənklˈuʒənz.", "authored_hold_after": 0.45, "hold_after": 0.45, "base_speed": 0.88, "speed_multiplier": 1.0, "effective_speed": 0.88, "sentences": [ { "sentence": 1, "speech_start": 24.874999999999996, "speech_end": 30.58, "audible_start": 24.974999999999998, "audible_end": 30.4, "duration": 5.705, "gap_from_previous": null, "trimmed_lead": 0.175, "trimmed_tail": 0.42, "text": "Evaluate held-out and per-plate behavior before using a classifier for biological conclusions.", "speech_text": "Evaluate held-out and per-plate behavior before using a [classifier](/klˈæsəfIəɹ/) for biological conclusions.", "phonemes": "əvˈæljʊˌAt hˈɛldˌWt ænd pɜɹplˈAt bəhˈAvjəɹ bəfˈɔɹ jˈuzɪŋ ɐ klˈæsəfIəɹ fɔɹ bˌIəlˈɑʤəkᵊl kənklˈuʒənz." } ] }, { "scene": 5, "speech_start": 31.029999999999998, "speech_end": 38.14, "scene_end": 38.660000000000004, "duration": 7.630000000000006, "text": "When the workflow finishes, spaCR produces discrimination, calibration, confusion, leakage, and robustness reports.", "speech_text": "When the workflow finishes, spacer produces discrimination, calibration, confusion, leakage, and robustness reports.", "phonemes": "wˌɛn ðə wˈɜɹkflˌO fˈɪnəʃᵻz, spˈAsəɹ pɹədˈusᵻz dəskɹˌɪmənˈAʃən, kˌæləbɹˈAʃən, kənfjˈuʒᵊn, lˈikɪʤ, ænd ɹObˈʌstnəs ɹəpˈɔɹts.", "authored_hold_after": 0.65, "hold_after": 0.52, "base_speed": 0.88, "speed_multiplier": 1.0, "effective_speed": 0.88, "sentences": [ { "sentence": 1, "speech_start": 31.029999999999998, "speech_end": 38.14, "audible_start": 31.13, "audible_end": 37.959999999999994, "duration": 7.11, "gap_from_previous": null, "trimmed_lead": 0.175, "trimmed_tail": 0.415, "text": "When the workflow finishes, spaCR produces discrimination, calibration, confusion, leakage, and robustness reports.", "speech_text": "When the workflow finishes, spacer produces discrimination, calibration, confusion, leakage, and robustness reports.", "phonemes": "wˌɛn ðə wˈɜɹkflˌO fˈɪnəʃᵻz, spˈAsəɹ pɹədˈusᵻz dəskɹˌɪmənˈAʃən, kˌæləbɹˈAʃən, kənfjˈuʒᵊn, lˈikɪʤ, ænd ɹObˈʌstnəs ɹəpˈɔɹts." } ] } ] }