#125 · Browser Audio Tool

Speech Segment Labeler

Detect likely speech and quiet sections from an audio file, review the timeline, and export segment labels as CSV.

Audio input

Local browser processing
Ready.

Audio is processed locally in your browser and is not uploaded.

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How to use Speech Segment Labeler

  1. Choose the requested audio input or generator settings.
  2. Run the tool and wait for the measured or synthesized result.
  3. Review the figures and practical note.
  4. Download the report, labels, markers, recording, or generated audio.

What this audio tool does

Detect likely speech and quiet sections from an audio file, review the timeline, and export segment labels as CSV.

Short-window RMS energy is compared with your threshold, then very short regions are merged.

Browser results depend on device resources and supported codecs. Use short or medium files for responsive processing.

Supported formats and limits

Common MP3, WAV, M4A/AAC, Ogg, FLAC, and WebM files may work when the current browser can decode them. Recording output depends on MediaRecorder support. Generated tones export as PCM WAV.

Example and practical tips

Begin with a short, clean file so you can verify the result quickly. For analysis tools, compare the result with what you hear rather than treating one number as a final mastering decision. Keep headphone volume moderate when generating tones.

Frequently asked questions

How are speech sections detected?

The tool measures short-window RMS energy and groups audio above the selected threshold as likely speech.

Is this speech recognition?

No. It labels timing regions only and does not transcribe words.

Why are breaths or music marked as speech?

Energy-based detection cannot identify meaning; adjust the threshold and review the exported labels.

Can I change the minimum segment length?

Yes. Short regions are merged to reduce rapid label switching.

What format is the label export?

The download is CSV with start time, end time, duration, and suggested label.

Processing details

PrivacyLocal browser processing
Tool number125
CategoryPodcast & Speech
OutputActual report, labels, recording, or WAV file