Recording Level & Silence Checker
Check whether a call, meeting or lecture recording came out right: whether it is too quiet or clipped, and where the silent gaps are. The tool shows the sample peak and average RMS level in dBFS and lists every part that stays below a silence threshold, with start and end times. WAV files are read sample by sample; other formats are decoded by your browser. Files are analysed on your device only.
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When to use it
Find dropouts in a recording
With a -50 dBFS threshold and 1 second minimum, every quiet stretch longer than a second is listed with its start and end time.
Check recording levels
You get a warning when the peak is below -20 dBFS or when samples hit 0 dBFS.
Trim leading and trailing silence
The leading and trailing silence lengths tell you how much to cut. The silence list can be saved as CSV.
How to use
- Drop a recording or click to choose.
- Adjust the silence threshold and minimum length if needed; the analysis reruns at once.
- Review the numbers, waveform and silence table, and save the table as CSV.
How it measures
- Peak (dBFS): The largest absolute sample value across channels, in dBFS (digital full scale = 0). Inter-sample (true) peaks are not measured.
- Average RMS (dBFS): Root mean square of all samples. A simple average, not perceived loudness (LUFS).
- Silent parts: RMS is measured in 50 ms windows; runs of windows below the threshold that last at least the minimum length are listed.
- Clipping: Count of samples with an absolute value of 0.999 (about -0.01 dBFS) or more.
Frequently asked questions
What is dBFS?
A level scale where 0 is the largest value digital audio can hold, so values are 0 or below. -6 dBFS is about half of full scale.
What threshold should I use?
-50 dBFS suits quiet rooms; raise it to around -40 dBFS for noisy recordings. The dashed line in the waveform shows the threshold.
Does it measure LUFS?
No. It measures peak and average dBFS and silent parts only.
Is my recording uploaded?
No. The file is read and analysed in your browser.
Last checked: October 24, 2026 · Dagochim team