Notification Sound MeasurementsMeasured levels and spectral characteristics of current OS and app event sounds
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Slack · Completion

save_and_checkout

66cc2e73af13

Level measurements

Integrated-21.8 LUFS
Maximum momentary-19.2 LUFS
True peak-8.6 dBTP
RMS-27.5 dBFS
Active RMS-26.5 dBFS
Duration1.202 s
Maximum short-term—
Loudness range—
Sample peak-8.6 dBFS
Sample crest factor18.9 dB
True-peak crest factor18.9 dB
Active duration0.950 s

Level over time

RMS · 10.0 ms · 121 points

Active threshold -56.0 dBFS
Short-window RMS level over time Each point is the channel-combined RMS of a non-overlapping frame. Values below −80 dBFS are pinned to the chart floor for display; the canonical JSON retains measured values, and digital silence remains null. 0 -20 -40 -60 -80 0.00 0.30 0.60 0.90 1.20 RMS (dBFS) Time (seconds)

Each point is the channel-combined RMS of a non-overlapping frame. Values below −80 dBFS are pinned to the chart floor for display; the canonical JSON retains measured values, and digital silence remains null.

Frequency characteristics

Spectral centroid1448 Hz
Peak frequency980 Hz
200 Hz–8 kHz energy99.1 %
Third-octave band energy Frequency is shown on the horizontal axis and band energy on the vertical axis. Values below −120 dBFS are pinned to the chart floor for display. 0 -20 -40 -60 -80 -100 -120 31.5 63 125 250 500 1k 2k 4k 8k 16k 25.0 Hz: -53.7 dBFS 31.5 Hz: -54.2 dBFS 40.0 Hz: -56.4 dBFS 50.0 Hz: -60.7 dBFS 63.0 Hz: -60.3 dBFS 80.0 Hz: -63.5 dBFS 100.0 Hz: -68.0 dBFS 125.0 Hz: -66.3 dBFS 160.0 Hz: -66.6 dBFS 200.0 Hz: -63.9 dBFS 250.0 Hz: -58.4 dBFS 315.0 Hz: -43.3 dBFS 400.0 Hz: -50.3 dBFS 500.0 Hz: -43.9 dBFS 630.0 Hz: -50.2 dBFS 800.0 Hz: -45.7 dBFS 1000.0 Hz: -32.3 dBFS 1250.0 Hz: -36.4 dBFS 1600.0 Hz: -33.3 dBFS 2000.0 Hz: -35.0 dBFS 2500.0 Hz: -45.0 dBFS 3150.0 Hz: -44.9 dBFS 4000.0 Hz: -47.9 dBFS 5000.0 Hz: -47.7 dBFS 6300.0 Hz: -49.5 dBFS 8000.0 Hz: -56.0 dBFS 10000.0 Hz: -73.0 dBFS 12500.0 Hz: -82.3 dBFS 16000.0 Hz: -84.2 dBFS Band energy (dBFS) Frequency (Hz)

Frequency is shown on the horizontal axis and band energy on the vertical axis. Values below −120 dBFS are pinned to the chart floor for display.

Current source occurrences

Slack v4.51.180

Completion

Contents/Resources/save_and_checkout.mp3
Acquisition
local_installation
Source observed
2026-08-09T06:27:30Z
Official source ↗

Technical metadata

SHA-25666cc2e73af13a702aadc5fb15cc365d3b445b97377aef9e372515632bad71eb2
Analyzed2026-08-09T06:27:30Z
CodecMP3 (MPEG audio layer 3)
Sample formatfltp
Sample rate44100 Hz
Channels2 · stereo
Analysis profilenotification-sound-db-bs1770-v2
FFmpegffmpeg version 8.1.2 Copyright (c) 2000-2026 the FFmpeg developers

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