macOS alert tones · Message
Text-Message-Acknowledgement-ThumbsDown
f399336ad403
Level measurements
Integrated-26.7 LUFS
Maximum momentary-25.6 LUFS
True peak-12.0 dBTP
RMS-29.6 dBFS
Active RMS-26.4 dBFS
Duration0.500 s
| Maximum short-term | — |
|---|---|
| Loudness range | — |
| Sample peak | -12.0 dBFS |
| Sample crest factor | 17.6 dB |
| True-peak crest factor | 17.6 dB |
| Active duration | 0.240 s |
Level over time
RMS · 10.0 ms · 51 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 centroid894 Hz
Peak frequency883 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
Text-Message-Acknowledgement-ThumbsDown.caf
- Acquisition
local_installation- Source observed
- 2026-08-09T06:27:15Z
Technical metadata
| SHA-256 | f399336ad40340b981fd2f4ff66f74c8a71a9c7f34bf3c7c8ced69cfcbee0ca9 |
|---|---|
| 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 |