macOS alert tones · Message
ReceivedMessage
169b1d1818f6
Level measurements
Integrated-19.6 LUFS
Maximum momentary-18.9 LUFS
True peak-13.1 dBTP
RMS-22.2 dBFS
Active RMS-21.7 dBFS
Duration0.518 s
| Maximum short-term | — |
|---|---|
| Loudness range | — |
| Sample peak | -13.1 dBFS |
| Sample crest factor | 9.2 dB |
| True-peak crest factor | 9.1 dB |
| Active duration | 0.460 s |
Level over time
RMS · 10.0 ms · 52 points
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 centroid311 Hz
Peak frequency291 Hz
200 Hz–8 kHz energy100.0 %
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
macOS alert tones v26.6.1
Message
ReceivedMessage.caf
- Acquisition
local_installation- Source observed
- 2026-08-09T06:27:15Z
Technical metadata
| SHA-256 | 169b1d1818f640db411aa349eb218e9f9b7eb902ba2c28d3595e1530022d84ca |
|---|---|
| Analyzed | 2026-08-09T06:27:15Z |
| Codec | PCM signed 16-bit little-endian |
| Sample format | s16 · 16 bit |
| Sample rate | 44100 Hz |
| Channels | 2 |
| Analysis profile | notification-sound-db-bs1770-v2 |
| FFmpeg | ffmpeg version 8.1.2 Copyright (c) 2000-2026 the FFmpeg developers |