Shorten low-level recording pauses
Shorten long pauses under an all-channel RMS threshold and export complete retained-frame mappings.
- 1Add input
- 2Adjust settings
- 3Get your result
Tool input and files are processed in this browser without being uploaded.
Before you start
Inspect rounded20ms windows of actual PCM, requiring every channel to be under the threshold. Remove the middle of qualifying pauses while retaining both edges. Download an actual PCM16 WAV and complete quiet/deleted intervals and half-open source/output frame mappings. Retained PCM16 frames are byte-exact without crossfade. This is not speech recognition; useful quiet sounds may be removed.
How to use this tool
- Choose local WAV/MP3.
- Set parameters and inspect actual results,statistics or frame mappings.
- Listen/inspect and download complete outputs.
Supported inputs and limits
One supported WAV/MP3 up to30 MiB and80 MiB actual decoded PCM;1–8 channels,8–192kHz; combined downloads100 MiB. WAV uses existing PCM8/16/24/32 and float32/64 support; MP3 must actually decode in the browser. No microphone, upload or remote audio fetch.
MP3 priming/gapless behavior varies by browser: the same checked MP3 produced2.000s in Chrome and2.040s in WebKit. All times/frames follow this browser’s actual decoded PCM; cross-browser sample/duration identity is not guaranteed. PCM16 output rounds decoded*32768 and clamps[-32768,32767] without normalization; float/24/32/MP3 original encoding bytes are not preserved.
Threshold−80…−10dBFS; minimum pause100…60,000ms; retained pause20ms up to minimum;10,000 pauses. Threshold comparison is inclusive; the final short window uses its actual samples. Long all-quiet input retains selected edges; input shorter than the minimum is not cut. Zero detections still deliver the original frame sequence.
Worked example
Example input
8kHz stereo10s recording with silence at2–5s.
Example options
{"thresholdDb":-40,"minMs":500,"keepMs":200}Example output
57,600 frames/7.2s retained;22,400 frames removed with two complete source ranges.
When something does not work
Correct parameters or export supported WAV,reduce decoded/work budgets and rerun. Retain the source to adjust thresholds,channels or filters.
Frequently asked questions
Can it remove quiet speech?
Yes. The threshold measures level only; inspect intervals and listen, retaining the source for retry.
Documentation & further reading
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