{
  "_comment": "Sample Feature Extraction Output - Developer: Molla Samser, Email: help@rskworld.in, Phone: +91 93305 39277, Website: https://rskworld.in, Year: 2026",
  "file_path": "audio/speaker_001/recordings/sample_001.wav",
  "duration": 3.45,
  "sample_rate": 22050,
  "pitch": 185.5,
  "zero_crossing_rate": 0.0823,
  "spectral_centroid": 2845.67,
  "spectral_rolloff": 5234.12,
  "mfcc": {
    "shape": [68, 13],
    "mean_values": [0.234, -0.145, 0.089, -0.067, 0.123, -0.098, 0.156, -0.112, 0.201, -0.134, 0.178, -0.156, 0.145],
    "std_values": [0.456, 0.389, 0.412, 0.378, 0.401, 0.365, 0.423, 0.391, 0.445, 0.367, 0.434, 0.352, 0.398]
  },
  "mel_spectrogram": {
    "shape": [68, 80],
    "mean_value": -45.23,
    "max_value": 0.0,
    "min_value": -80.45
  },
  "extraction_timestamp": "2026-01-15T10:30:00Z",
  "extraction_method": "librosa",
  "version": "1.0"
}