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{ "features_extracted": { "cadence_detection": { "cadence_rate": 0, "cadences": [], "count": 0 }, "cross_analysis_scores": { "complexity_score": 0.4939, "emotion_score": 0.3327, "humanity_score": 0.30364 }, "csv_matched": false, "embeddings": { "embedding_128": [ 0.59796, 0.15288000000000002, 0.43081, 0.32016, 0.16829000000000002, 0.68478, 0.70157, 0.9873600000000001, 0.26887, 0.023700000000000002, 0.02067, 0.44019, 0.08223000000000001, 0.87072, 0.15369000000000002, 0.7486100000000001, 0.7310300000000001, 0.16364, 0.8113300000000001, 0.9007700000000001, 0.20375000000000001, 0.94169, 0.9338700000000001, 0.97367, 0.9058200000000001, 0.15104, 0.51327, 0.28269, 0.43258, 0.50343, 0.13, 0.63553, 0.59796, 0.15288000000000002, 0.43081, 0.32016, 0.16829000000000002, 0.68478, 0.70157, 0.9873600000000001, 0.26887, 0.023700000000000002, 0.02067, 0.44019, 0.08223000000000001, 0.87072, 0.15369000000000002, 0.7486100000000001, 0.7310300000000001, 0.16364, 0.8113300000000001, 0.9007700000000001, 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0.63553 ], "embedding_32": [ 0.59796, 0.15288000000000002, 0.43081, 0.32016, 0.16829000000000002, 0.68478, 0.70157, 0.9873600000000001, 0.26887, 0.023700000000000002, 0.02067, 0.44019, 0.08223000000000001, 0.87072, 0.15369000000000002, 0.7486100000000001, 0.7310300000000001, 0.16364, 0.8113300000000001, 0.9007700000000001, 0.20375000000000001, 0.94169, 0.9338700000000001, 0.97367, 0.9058200000000001, 0.15104, 0.51327, 0.28269, 0.43258, 0.50343, 0.13, 0.63553 ], "embedding_64": [ 0.59796, 0.15288000000000002, 0.43081, 0.32016, 0.16829000000000002, 0.68478, 0.70157, 0.9873600000000001, 0.26887, 0.023700000000000002, 0.02067, 0.44019, 0.08223000000000001, 0.87072, 0.15369000000000002, 0.7486100000000001, 0.7310300000000001, 0.16364, 0.8113300000000001, 0.9007700000000001, 0.20375000000000001, 0.94169, 0.9338700000000001, 0.97367, 0.9058200000000001, 0.15104, 0.51327, 0.28269, 0.43258, 0.50343, 0.13, 0.63553, 0.59796, 0.15288000000000002, 0.43081, 0.32016, 0.16829000000000002, 0.68478, 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"instrument_list": [ "Piano" ], "note_count_per_instrument": { "Piano": 6597 }, "num_instruments": 1, "velocity_stats_per_instrument": { "Piano": { "mean": 85.74, "std": 14.2 } } }, "melodic_analysis": { "interval_distribution": { "leap": 87, "step": 9, "third": 61, "unison": 0 }, "melodic_density": 21.27, "melody_contour": [ "stable", "stable", "stable", "stable", "stable", "stable", "stable", "stable", "stable", "stable", "stable", "stable", "stable", "stable", "stable", "stable", "stable", "stable", "stable", "stable" ], "melody_range": [ 35, 86 ], "unique_notes": 26 }, "midi_filename": "e29dc523bcf4c628e90d5360b77b379b.mid", "musical_signature": { "signature_hash_64bit": "1010101010101010101010101010101010101010101010101010101010101010", "signature_strength": 28.8542, "signature_vector_256": [ 84.64, 99.32, 80.28, 81.94, 71.77, 5.08, 49.86, 40.42, 42.07, 62.76, 61, 28.87, 55.73, 30.21, 74.4, 3.31, 93.28, 47.8, 57.61, 69.11, 94.99, 80.47, 37.06, 6.13, 96.66, 48.52, 45.99, 19.33, 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false, "name": "Unknown", "num_notes": 896, "program": 7 }, { "is_drum": false, "name": "Unknown", "num_notes": 252, "program": 48 }, { "is_drum": false, "name": "Unknown", "num_notes": 847, "program": 27 }, { "is_drum": false, "name": "Unknown", "num_notes": 851, "program": 27 }, { "is_drum": false, "name": "Unknown", "num_notes": 853, "program": 27 }, { "is_drum": false, "name": "Unknown", "num_notes": 847, "program": 27 } ], "key_signature_changes": 1, "match_score": 0, "num_instruments": 9, "tempo_csv": 140.628, "tempo_est": 214.93331542222404, "time_signature_changes": 1, "title": "Killin Time", "total_notes": 6624, "track_id": "TRNZUDW128EF359ACE", "unique_pitches": 49 } }
End of preview. Expand in Data Studio
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Lakh MIDI Dataset — Fully Cleaned & Structured JSON (44,129 files)

This dataset is a fully cleaned and normalized version of the Lakh MIDI Dataset.
Each MIDI file has been parsed, validated, and converted into a consistent JSON structure with detailed musical metadata.

✔ 44,129 cleaned JSON files
✔ instrument programs
✔ notes, durations, velocities
✔ tempo curves
✔ key signatures
✔ time signatures
✔ tracks & channels
✔ structural markers
✔ file-level metadata
✔ consistent schema across all files

Suitable for:

  • Music AI
  • symbolic modeling
  • generative models
  • audio-to-symbolic learning
  • embeddings
  • piano transcription
  • MIR research
  • supervised ML datasets
  • music information retrieval

License: Same as original Lakh dataset (public research dataset, metadata extracted legally).
All JSON files are derived from open-source MIDI data.

For commercial or large-scale dataset cleaning services:

— Zeronex

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