{"status": "success", "features": {"bpm": 129.88, "bpm_confidence": 1.0, "key": "C# minor", "key_confidence": 0.8135, "duration_s": 75.7, "loudness_lufs": -15.84, "peak_dbfs": 0.07, "dynamic_range_db": 17.78, "stereo_width_pct": 1.35, "spectrum": {"sub_pct": 13.95, "bass_pct": 44.26, "low_mid_pct": 31.25, "mid_pct": 9.78, "high_mid_pct": 0.6, "air_pct": 0.16, "centroid_hz": 436.7, "rolloff_hz": 780.6}, "rhythm": {"onset_density": 5.23, "beat_regularity": 0.0281, "zero_crossing_rate": 0.042362}, "sections": [{"label": "verse", "start_s": 0.0, "end_s": 1.61}, {"label": "verse", "start_s": 1.61, "end_s": 8.09}, {"label": "verse", "start_s": 8.09, "end_s": 11.33}, {"label": "chorus", "start_s": 11.33, "end_s": 12.13}, {"label": "verse", "start_s": 12.13, "end_s": 18.72}, {"label": "chorus", "start_s": 18.72, "end_s": 19.53}, {"label": "verse", "start_s": 19.53, "end_s": 23.79}, {"label": "bridge", "start_s": 23.79, "end_s": 26.56}, {"label": "bridge", "start_s": 26.56, "end_s": 30.26}, {"label": "verse", "start_s": 30.26, "end_s": 30.95}, {"label": "verse", "start_s": 30.95, "end_s": 34.18}, {"label": "verse", "start_s": 34.18, "end_s": 40.87}, {"label": "chorus", "start_s": 40.87, "end_s": 41.68}, {"label": "verse", "start_s": 41.68, "end_s": 48.25}, {"label": "chorus", "start_s": 48.25, "end_s": 49.06}, {"label": "verse", "start_s": 49.06, "end_s": 53.34}, {"label": "bridge", "start_s": 53.34, "end_s": 56.1}, {"label": "verse", "start_s": 56.1, "end_s": 60.49}, {"label": "verse", "start_s": 60.49, "end_s": 61.17}, {"label": "chorus", "start_s": 61.17, "end_s": 62.57}, {"label": "chorus", "start_s": 62.57, "end_s": 63.94}, {"label": "chorus", "start_s": 63.94, "end_s": 66.01}, {"label": "verse", "start_s": 66.01, "end_s": 68.56}, {"label": "chorus", "start_s": 68.56, "end_s": 69.95}, {"label": "chorus", "start_s": 69.95, "end_s": 71.33}, {"label": "verse", "start_s": 71.33, "end_s": 72.03}, {"label": "chorus", "start_s": 72.03, "end_s": 72.71}, {"label": "verse", "start_s": 72.71, "end_s": 75.7}], "chromagram": {"C": 0.5598, "C#": 0.7176, "D": 0.564, "D#": 0.6792, "E": 0.64, "F": 0.5228, "F#": 0.7088, "G": 0.585, "G#": 0.6898, "A": 0.7443, "A#": 0.6263, "B": 0.5478}, "mfcc_mean": [-205.1234, 157.6866, -32.6418, 21.8236, -17.7103, 7.9102, -11.5393, 3.2531, -7.8519, -4.9606, -6.4835, -6.514, -6.6198]}, "elapsed_s": 12.65}