macOS alert tones · Message
Text-Message-Acknowledgement-ThumbsUp
d77c74ed9035
Level measurements
Integrated-27.7 LUFS
Maximum momentary-25.3 LUFS
True peak-12.0 dBTP
RMS-29.5 dBFS
Active RMS-25.5 dBFS
Duration0.497 s
| Maximum short-term | — |
|---|---|
| Loudness range | — |
| Sample peak | -12.0 dBFS |
| Sample crest factor | 17.4 dB |
| True-peak crest factor | 17.5 dB |
| Active duration | 0.200 s |
Level over time
RMS · 10.0 ms · 50 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 centroid1300 Hz
Peak frequency883 Hz
200 Hz–8 kHz energy99.9 %
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
Text-Message-Acknowledgement-ThumbsUp.caf
- Acquisition
local_installation- Source observed
- 2026-08-09T06:27:15Z
Technical metadata
| SHA-256 | d77c74ed903575a2543cc7b81ca4e3dca7fd889a83669305216b4090a8498c1d |
|---|---|
| Analyzed | 2026-08-09T06:27:15Z |
| Codec | PCM signed 16-bit little-endian |
| Sample format | s16 · 16 bit |
| Sample rate | 44100 Hz |
| Channels | 2 · stereo |
| Analysis profile | notification-sound-db-bs1770-v2 |
| FFmpeg | ffmpeg version 8.1.2 Copyright (c) 2000-2026 the FFmpeg developers |