Spoken-audio cleanup

Take the empty space out of narration—without cutting blindly.

Voiceovers, lessons, audiobook drafts, and recorded explanations often contain long setup gaps and dead air. Polley SmashCut analyzes quiet regions locally, shows the proposed removals on a waveform timeline, and lets you restore or fine-tune cuts before producing a new audio file.

■ speech kept■ proposed quiet-region cut

Review-first workflow

Faster cleanup with a human decision before export

Choose one file, several files, or a folder

Prepare a single voiceover or process a recurring collection of spoken recordings with the same general settings.

Analyze the recording

Start with a preset or adjust custom silence settings. Analysis identifies likely quiet regions; it does not overwrite the source.

Inspect the waveform timeline

Proposed removals appear as regions you can select. Restore an intentional pause, move a boundary, or remove the region again after listening.

Preview the tightened pacing

Listen for clipped word endings, unnatural transitions, or pauses that carry meaning. Adjust before committing to the new file.

Export an audio copy

Create MP3, WAV, or M4A output locally. The original recording remains available if you want to revisit the settings.

Voiceover takes

Reduce recording-room pauses between lines before handing audio to an editor.

Narrated lessons

Tighten long thinking gaps while keeping pauses that help learners follow the explanation.

Audio-only episodes

Prepare a cleaner spoken track without uploading private source files to an online service.

Silence is not always a mistake. A dramatic pause, breath, or transition can support delivery. That is why the review timeline matters more than a one-click promise.

Review the quiet parts before they disappear.

Polley SmashCut is a local Windows tool with audio and video export options.

Get SmashCut on itch.io ↗