{ "$schema": "../schemas/asset.schema.json", "analysis_profile": "notification-sound-db-bs1770-v2", "analyzed_at": "2026-08-09T06:27:17Z", "audio": { "channel_count": 1, "channel_layout": null, "duration_seconds": 0.427007, "sample_rate_hz": 44100 }, "file": { "bits_per_sample": 16, "byte_size": 41758, "codec_long_name": "PCM signed 16-bit little-endian", "codec_name": "pcm_s16le", "container_format": "caf", "extension": ".caf", "sample_format": "s16" }, "levels": { "active_segment": { "duration_seconds": 0.22, "end_seconds": 0.22, "leading_silence_seconds": 0.0, "rms_dbfs": -29.785, "start_seconds": 0.0, "threshold_dbfs": -60.0, "trailing_silence_seconds": 0.207007 }, "channels": [ { "index": 0, "rms_dbfs": -32.664, "sample_peak_dbfs": -18.001 } ], "rms_dbfs": -32.664, "rms_envelope": { "frame_duration_seconds": 0.01, "maximum_point_count": 400, "method": "non-overlapping channel-combined RMS frames", "points": [ { "rms_dbfs": -26.548, "time_seconds": 0.005 }, { "rms_dbfs": -26.859, "time_seconds": 0.015 }, { "rms_dbfs": -28.507, "time_seconds": 0.025 }, { "rms_dbfs": -29.958, "time_seconds": 0.035 }, { "rms_dbfs": -31.812, "time_seconds": 0.045 }, { "rms_dbfs": -33.747, "time_seconds": 0.055 }, { "rms_dbfs": -37.35, "time_seconds": 0.065 }, { "rms_dbfs": -41.134, "time_seconds": 0.075 }, { "rms_dbfs": -44.303, "time_seconds": 0.085 }, { "rms_dbfs": -27.67, "time_seconds": 0.095 }, { "rms_dbfs": -22.616, "time_seconds": 0.105 }, { "rms_dbfs": -24.778, "time_seconds": 0.115 }, { "rms_dbfs": -27.077, "time_seconds": 0.125 }, { "rms_dbfs": -29.246, "time_seconds": 0.135 }, { "rms_dbfs": -31.663, "time_seconds": 0.145 }, { "rms_dbfs": -33.936, "time_seconds": 0.155 }, { "rms_dbfs": -37.578, "time_seconds": 0.165 }, { "rms_dbfs": -41.363, "time_seconds": 0.175 }, { "rms_dbfs": -45.249, "time_seconds": 0.185 }, { "rms_dbfs": -49.328, "time_seconds": 0.195 }, { "rms_dbfs": -53.626, "time_seconds": 0.205 }, { "rms_dbfs": -56.834, "time_seconds": 0.215 }, { "rms_dbfs": -62.259, "time_seconds": 0.225 }, { "rms_dbfs": -69.646, "time_seconds": 0.235 }, { "rms_dbfs": -72.74, "time_seconds": 0.245 }, { "rms_dbfs": -70.018, "time_seconds": 0.255 }, { "rms_dbfs": -76.614, "time_seconds": 0.265 }, { "rms_dbfs": -76.714, "time_seconds": 0.275 }, { "rms_dbfs": -78.132, "time_seconds": 0.285 }, { "rms_dbfs": -79.046, "time_seconds": 0.295 }, { "rms_dbfs": -76.011, "time_seconds": 0.305 }, { "rms_dbfs": -79.984, "time_seconds": 0.315 }, { "rms_dbfs": -83.482, "time_seconds": 0.325 }, { "rms_dbfs": -82.371, "time_seconds": 0.335 }, { "rms_dbfs": -87.25, "time_seconds": 0.345 }, { "rms_dbfs": -85.84, "time_seconds": 0.355 }, { "rms_dbfs": -94.475, "time_seconds": 0.365 }, { "rms_dbfs": -73.676, "time_seconds": 0.375 }, { "rms_dbfs": -70.716, "time_seconds": 0.385 }, { "rms_dbfs": -73.668, "time_seconds": 0.395 }, { "rms_dbfs": -74.467, "time_seconds": 0.405 }, { "rms_dbfs": -75.685, "time_seconds": 0.415 }, { "rms_dbfs": -75.956, "time_seconds": 0.423503 } ] }, "sample_crest_factor_db": 14.664, "sample_peak_dbfs": -18.001, "true_peak_crest_factor_db": 14.664 }, "loudness": { "integrated_lufs": -33.1, "loudness_range_lu": null, "maximum_momentary_lufs": -32.2, "maximum_short_term_lufs": null, "momentary_window_seconds": 0.4, "notes": [ "silent_tail_added_for_meter_settling", "source_shorter_than_short_term_window" ], "short_term_window_seconds": 3.0, "standard": "ITU-R BS.1770-5 / EBU Mode", "tail_padding_seconds": 3.1, "true_peak_dbtp": -18.0 }, "schema_version": "1.1.0", "sha256": "6cba6b545682ecf905b1c81c6b2cd858dd8436cb31f2dde40cc823ba1743df8e", "spectrum": { "broad_band_energy_dbfs": { "high_5000_10000_hz": -96.295, "low_80_200_hz": -91.744, "low_mid_200_500_hz": -76.531, "mid_500_2000_hz": -33.192, "presence_2000_5000_hz": -79.025, "sub_20_80_hz": -93.668 }, "method": "Welch PSD, Hann window, 4096-sample maximum segment", "peak_frequency_hz": 1173.56, "spectral_centroid_hz": 1119.779, "speech_band_200_8000_hz_energy_percent": 99.999, "third_octave_band_energy_dbfs": [ { "center_hz": 25.0, "energy_dbfs": -103.738 }, { "center_hz": 31.5, "energy_dbfs": -102.144 }, { "center_hz": 40.0, "energy_dbfs": -101.113 }, { "center_hz": 50.0, "energy_dbfs": -100.227 }, { "center_hz": 63.0, "energy_dbfs": -99.428 }, { "center_hz": 80.0, "energy_dbfs": -100.912 }, { "center_hz": 100.0, "energy_dbfs": -101.193 }, { "center_hz": 125.0, "energy_dbfs": -98.804 }, { "center_hz": 160.0, "energy_dbfs": -99.12 }, { "center_hz": 200.0, "energy_dbfs": -96.947 }, { "center_hz": 250.0, "energy_dbfs": -91.833 }, { "center_hz": 315.0, "energy_dbfs": -87.622 }, { "center_hz": 400.0, "energy_dbfs": -81.231 }, { "center_hz": 500.0, "energy_dbfs": -74.944 }, { "center_hz": 630.0, "energy_dbfs": -69.235 }, { "center_hz": 800.0, "energy_dbfs": -40.646 }, { "center_hz": 1000.0, "energy_dbfs": -48.564 }, { "center_hz": 1250.0, "energy_dbfs": -34.227 }, { "center_hz": 1600.0, "energy_dbfs": -60.081 }, { "center_hz": 2000.0, "energy_dbfs": -72.161 }, { "center_hz": 2500.0, "energy_dbfs": -84.08 }, { "center_hz": 3150.0, "energy_dbfs": -87.118 }, { "center_hz": 4000.0, "energy_dbfs": -92.431 }, { "center_hz": 5000.0, "energy_dbfs": -97.953 }, { "center_hz": 6300.0, "energy_dbfs": -100.979 }, { "center_hz": 8000.0, "energy_dbfs": -102.687 }, { "center_hz": 10000.0, "energy_dbfs": -103.65 }, { "center_hz": 12500.0, "energy_dbfs": -103.001 }, { "center_hz": 16000.0, "energy_dbfs": -100.192 } ] }, "toolchain": { "ffmpeg": "ffmpeg version 8.1.2 Copyright (c) 2000-2026 the FFmpeg developers", "ffprobe": "ffprobe version 8.1.2 Copyright (c) 2007-2026 the FFmpeg developers", "notification_sound_db": "0.1.0" } }