Notification Sound MeasurementsMeasured levels and spectral characteristics of current OS and app event sounds
← Back to all measurements

macOS CoreAudio event sounds · UI feedback

dtmf-star

19676ea5a0e5

Level measurements

Integrated-18.4 LUFS
Maximum momentary-16.5 LUFS
True peak-6.0 dBTP
RMS-12.1 dBFS
Active RMS-12.1 dBFS
Duration0.138 s
Maximum short-term—
Loudness range—
Sample peak-6.0 dBFS
Sample crest factor6.0 dB
True-peak crest factor6.1 dB
Active duration0.138 s

Level over time

RMS · 10.0 ms · 14 points

Active threshold -51.6 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 0.000 0.035 0.069 0.104 0.138 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 centroid1075 Hz
Peak frequency1206 Hz
200 Hz–8 kHz energy100.0 %
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: -131.5 dBFS 31.5 Hz: -132.0 dBFS 40.0 Hz: -128.9 dBFS 50.0 Hz: -128.3 dBFS 63.0 Hz: -128.9 dBFS 80.0 Hz: -127.8 dBFS 100.0 Hz: -125.9 dBFS 125.0 Hz: -109.3 dBFS 160.0 Hz: -118.6 dBFS 200.0 Hz: -123.8 dBFS 250.0 Hz: -118.1 dBFS 315.0 Hz: -119.8 dBFS 400.0 Hz: -105.4 dBFS 500.0 Hz: -109.6 dBFS 630.0 Hz: -97.9 dBFS 800.0 Hz: -65.5 dBFS 1000.0 Hz: -15.1 dBFS 1250.0 Hz: -15.1 dBFS 1600.0 Hz: -96.4 dBFS 2000.0 Hz: -105.2 dBFS 2500.0 Hz: -104.4 dBFS 3150.0 Hz: -96.6 dBFS 4000.0 Hz: -102.6 dBFS 5000.0 Hz: -99.9 dBFS 6300.0 Hz: -103.2 dBFS 8000.0 Hz: -101.2 dBFS 10000.0 Hz: -101.3 dBFS 12500.0 Hz: -100.3 dBFS 16000.0 Hz: -100.4 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

macOS CoreAudio event sounds v26.6.1

UI feedback

telephony/dtmf-star.caf
Acquisition
local_installation
Source observed
2026-08-09T06:27:20Z
Official source ↗

Technical metadata

SHA-25619676ea5a0e56fc6bcdb55a9dc7116ec719739b6f7bdf3f100f98610d47d1d95
Analyzed2026-08-09T06:27:20Z
CodecPCM signed 16-bit little-endian
Sample formats16 · 16 bit
Sample rate44100 Hz
Channels1
Analysis profilenotification-sound-db-bs1770-v2
FFmpegffmpeg version 8.1.2 Copyright (c) 2000-2026 the FFmpeg developers

View canonical JSON →