01Phase 01
1. Speech Cushion Calibration
Every detected silence gap retains 0.32 seconds of natural breathing room to preserve phonetic decay and natural inhale beats.
Natural Pacing · 0.32s Breathing Cushion
Natural Breath & Silence Remover
Unlike aggressive noise gates that brutally delete all breathing room, AutoSilenceCut preserves calibrated natural speech cushions so your voice never sounds breathless or robotic.
Natural Breath & Silence Remover
Ready for a local audio or video file
Local Browser Audio Engine
Scanning speech & quiet pauses…
Reading media and computing RMS energy…
1Reading file
2Decoding audio
3Scanning quiet
4Building map
Loudness:-16.0 LUFS
Peak:-1.0 dBFS
0:00 savedPacing Preset
Speech cushionsFine-tune detection parameters
Balanced
Balanced (~-38dB): Calibrated natural balance recommended for podcasts, YouTube videos, and dialogue.
0.80s
0.20s (all micro-pauses)2.50s (only long pauses)
0.32s
0.00s (flush / jump)0.80s (spacious)
Automatically removes silence before first speech and after last speech.
Pause #01✂️ Cut Proposed
00:14.2 → 00:16.8 (2.6s gap)
1.6s quiet gap; keeps 0.32s breathing room.
Tip: Press Del or Backspace to cut selected silenceR to keep
Silence Map (0)
0 silences found (0.0s dead air) · 0 will be cut, 0 kept
Target ScopeAll Clips
All edits reversible
Studio DSP & Ambience Rack
Real-Time DSP✨
1-Click Full Background Noise Removal
Removes 80Hz rumble, 50/60Hz hum, room hiss & mouth clicks
Anti-Blackout
Fills shortened silence gaps with authentic room tone synthesized from your recording, eliminating unnatural "vacuum dropouts".
Butterworth
-40 dBFS
+2.5dB Clarity
Sibilance
Cubic Spline
-1.0 dBFS
Subtitle Range Protection
Protect Intentional Sentences & Pauses
Importing your subtitle transcript locks dialogue boundaries so dramatic reflections and deliberate speech pauses inside sentences are never auto-cut.
No subtitles loaded
Hesitation Splicer (Fillers & Stutters)
Removes verbal hesitation sounds (um, uh, er, like) and repeated stutters.
0 fillers0 stutters
Merged with acoustic cuts
A/V Dual-System Sync
Drift ConformerEdit Evidence & Provenance
Manifest v1.0Total Proposals
0
Active Cuts
0
Restored Pauses
0
Protected Lines
0
Structural Export Validation:
✔ Zero server uploads (100% Client-Side)
✔ True-Peak Limiter ceiling ≤ -1.0 dBFS
✔ Duration conservation verified (Δ ≤ 5ms)
✔ 8ms anti-click zero-crossing micro-fades
Media Preflight & Capabilities
Source Format:Audio Track
Sample Rate:44.1 kHz
Channels:Stereo (2-ch)
Memory Footprint:~12 MB RAM
Local Processing:100% Client-Side
Verified Export Options:
- ✔ 16-Bit PCM WAV: Uncompressed lossless master audio.
- ✔ Audacity Labels: Drag-and-drop label track for Audacity / Reaper.
- ✔ CSV Cue Sheet: Tabular marker list with exact timestamps.
- ✔ EDL / FCPXML: Timeline cut lists: EDL for Premiere & Resolve, FCPXML for Final Cut & Resolve.
- ✔ Evidence Manifest: JSON & CSV audit trail with a CRC-32 source checksum.
Episode Show Notes
Silence #01 detected (00:04.4 → 00:05.0)
🎬Sequence Track1 clip
Pause Map & Timeline
Click / drag to scrub0:000:00
✨
✨ Cleaning Noise...Background Noise Remover
Multi-band spectral Wiener filtering & room rumble removal
Strong (75%)
0% (Off)50% (Balanced)100% (Studio Max)
Space Play/Pause · Del Trim · R Keep · J/L Jump 2sDouble-click waveform to trim
Lossless 16-Bit Master Audio & Edit Ledger Export
Rendered locally in browser memory with 8ms anti-click micro-fades. Zero server upload.
Detected from video
Chain in Studio FlowTimeline files reference your media by file name only. Final Cut Pro, DaVinci Resolve or Premiere Pro will ask you to relink the clip to the original file.
✨ Hover any tool icon to see what it does · Click to launch
100% browser-local processing · No files uploaded to any server
Acoustic Engineering Guide · Architecture
How this tool works in browser memory
How this tool decodes, analyzes, and masters your dialogue locally with zero cloud latency.
02Phase 02
2. Reversible Per-Cut Ledger
Audition any cut with 'Hear Before' and 'Preview Cut' buttons. Restore reflective pauses with a single click or keyboard shortcut.
03Phase 03
3. 8ms Anti-Click Micro-Crossfades
Splices audio segments with smooth equal-power crossfades, eliminating pop artifacts and abrupt zero-crossing clicks.
Connected finishing workflows
Explore companion utilities for dialogue cleanup, speech pacing, and mastering.
Audio Standards & Research
Engineering guides & deep-dive workflows
Explore the acoustic principles, ITU-R loudness standards, and pacing techniques behind this tool.
Breath Editing6 min read
How to Edit Breaths in a Podcast or Voiceover Without Sounding Unnatural
Why total breath removal creates an unnatural, synthetic reading. How to attenuate heavy gasps by -6dB to -12dB while retaining essential intake beats.
Linguistics6 min read
What Is a Natural Pause? A Creator’s Guide to Editing Speech
The 4 types of speech pauses: semantic punctuation, breath cycles, cognitive retrieval, and dead air. How to protect conversational rhythm.
Silence Removal8 min read
How to Remove Silence From Audio Without Making It Sound Rushed
Why zero-silence gates ruin speech cadence. Learn how a calibrated 0.32-second speech cushion preserves natural breath beats and phoneme decay.
Frequently Asked Questions
Common Questions & Technical Clarifications
Why is a 0.32-second retained breathing cushion necessary?+
Human speech requires natural inhale rhythms and acoustic phonetic decay. Hard silence strippers and harsh noise gates cut speech right at the word edge, clipping subtle consonant endings (like 't', 'p', and 'k') and creating a breathless, unnatural cadence. The 0.32s cushion keeps natural speech cadence while cutting dead pauses.
How does AutoSilenceCut differentiate between natural breath pauses and dead air?+
The silence scanner analyzes 25ms RMS energy windows against calibrated decibel thresholds. Gaps shorter than your minimum duration threshold (e.g. 0.8s for Natural mode) are preserved as conversational rhythm, while extended quiet intervals are shortened while retaining the protective 0.32s cushion.
Can I adjust the breathing cushion length for faster or tighter speech?+
Yes. You can select between Natural (0.8s min gap / 0.32s cushion), Tight (0.5s min gap / 0.15s cushion), and Fast (0.35s min gap / 0.05s cushion) presets, or use the Fine-Tune drawer to customize the cushion down to the millisecond.
Can I restore a breath that was marked for trimming?+
Yes. Every detected gap is itemized in the reviewable pause ledger. You can audition the pause ('Hear Before' / 'Preview Cut') and click 'Restore' (or press R) to keep that breath completely intact.
Does breath removal cause audible clicks at splice points?+
No. Splice boundaries are automatically smoothed using 8ms equal-power linear micro-crossfades to eliminate clicks and DC offset thumps.