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Live RMS Visualizer · Auto-Cushioned Silence Cut

Record voice memos and trim dead air automatically

Capture broadcast-quality microphone audio with real-time energy visualizers, hardware hum filtering, and instant silence trimming the moment you hit stop.

Record voice memos and trim dead air automatically

Ready for a local audio or video file

✨ Hover any tool icon to see what it does · Click to launch

Export Formats & Application Guide

AutoSilenceCut provides multi-option categorized exports tailored for video creators, podcasters, sound designers, and post-production editors.

🎬 Video Formats

Trimmed Video (.webm / .mp4)

Rendered cut video with silent gaps stripped out directly in the browser.

YouTube, Social, Quick Share
Extracted Master Audio (.wav)

Lossless 16-bit uncompressed audio track extracted from your video file.

DAW audio finishing

🎵 Lossless Audio & Takes

Master Audio (16-bit Lossless .wav)

Uncompressed broadcast-grade audio with 8ms anti-click micro-fades and True-Peak limiting.

Podcasts, Voiceovers, Mastering
Compressed Audio (.webm / .mp3)

Lightweight compressed file for fast messaging, email, or draft reviews.

Preview & Fast Sharing
Split Takes to ZIP (.zip)

Bundles individual WAV slices for every speech segment plus a manifest CSV.

Sample Packs, Voice Banks, ML

🎞️ NLE & DAW Project Timelines

Adobe Premiere / DaVinci Resolve (.edl)

CMX 3600 standard edit decision list with frame-accurate timeline cuts.

Premiere Pro, DaVinci Resolve
Final Cut Pro XML (.fcpxml)

Modern XML sequence exchange format for Final Cut Pro and DaVinci Resolve.

Final Cut Pro, DaVinci Resolve
Audacity / Reaper Labels (.txt)

Tab-delimited text file for instant label track import.

Audacity, Cockos Reaper
CSV Edit Ledger (.csv)

RFC-compliant spreadsheet table with exact start/end timestamps and cut durations.

Excel, Google Sheets, Auditing

📝 Subtitles & Metadata

WebVTT Subtitles (.vtt)

W3C standard WebVTT subtitle track re-synchronized with edited speech timing.

HTML5 Video, YouTube, Vimeo
SubRip Subtitles (.srt)

Universal SubRip subtitle file with sequentially numbered and re-timed dialogue cues.

VLC, Social Media, Captions
Show Notes & Summary (.md)

Structured Markdown notes with episode overview, key takeaways, and timestamped chapters.

Podcast Hosts, Blog Posts, Descriptions
Edit Evidence Manifest (.json)

Machine-readable JSON audit manifest with a CRC-32 source checksum, sync diagnosis, and decision items.

Compliance, Archive, Pipelines

Keyboard Shortcuts

Play / Pause
Space
Jump Back 2s
J
Pause
K
Jump Forward 2s
L
Cut Selected Silence
Del / Backspace / D
Keep Selected Pause
R / U
Cycle Pauses
↑ / ↓ / ← / →
Undo / Redo
⌘Z / ⇧⌘Z

Arrange & Merge Clips

Drag clips to arrange the sequence before trimming silences

Select or drop additional video/audio clips to append
No clips added yet. Add multiple videos or audio files to arrange and merge them.
0 clips·00:00.0 Total
100% Client-Side · Zero Server Uploads

Dual-System Audio/Video Sync

Align camera scratch video with separately recorded high-quality external microphone audio. Diagnoses time offset ($\Delta t$) and linear crystal drift ($\alpha$ PPM) 100% locally.

Primary video or reference audio track with camera mic.

High-fidelity external recording (Zoom, Tascam, Rode, lavalier).

Zero cloud uploads · 100% Client-Side

Start fresh with a new file?

Your current edits and audio buffer will be cleared from memory.

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.

01Phase 01

WebRTC Microphone Capture

Connects directly to your system microphone via browser MediaStream with uncompressed 32-bit floating point audio sampling.

02Phase 02

Real-Time RMS Energy Meter

Visualizes voice level dynamics and noise floor in real-time, helping you maintain consistent broadcast volume while speaking.

03Phase 03

Instant Record & Polish Trim

The moment recording stops, AutoSilenceCut scans and removes awkward dead air using the calibrated 0.32s speech cushion.

Connected finishing workflows

Explore companion utilities for dialogue cleanup, speech pacing, and mastering.

Studio Sound Enhancer

Apply presence EQ and broadcast limiter to recorded voice memos.

Open tool→

Background Noise Cleanup

Eliminate computer fan hum and HVAC room noise.

Open tool→

Mouth De-Clicker

Remove saliva clicks and mouth pops from spoken recordings.

Open tool→
Audio Standards & Research

Engineering guides & deep-dive workflows

Explore the acoustic principles, ITU-R loudness standards, and pacing techniques behind this tool.

Browse All 58 Guides
Recording Technique7 min read

How to Make a Voice Recording Sound Clearer Before You Start Editing

The source-first clarity framework: capsule proximity, 45-degree plosive deflection, reflection absorption, and 24-bit headroom management.

Read engineering guide→
Voice Memo Cleanup7 min read

How to Clean Up Interview Audio Recorded on a Smartphone or Voice Memo

Fixing common phone recording defects: counteracting aggressive AGC pumping, cutting 100Hz boxy resonance, and downward room expansion.

Read engineering guide→
Audio Compression8 min read

Voice Recording Compression Settings: Ratios, Attack, and Release for Speech

Optimum compressor settings for dialogue: why 2:1–4:1 ratios with 20ms attack and 150ms release preserve consonants and smooth vocal dynamics.

Read engineering guide→

Frequently Asked Questions

Common Questions & Technical Clarifications

Is my microphone audio recorded privately?+

Yes, 100%. AutoSilenceCut records directly into local browser memory. No audio bytes or voice recordings are ever transmitted to any cloud server.

How does the automatic silence removal work on voice recordings?+

When you finish speaking and stop recording, our silence detection engine instantly maps all quiet intervals and trims dead air while preserving a 0.32s natural speech cushion around words.

Can I review and restore specific pauses before exporting?+

Yes. Every detected pause is listed with exact timecodes and audition controls (Hear Before / Preview Cut), allowing you to keep reflective moments with one click.

Can I record on mobile phones and tablets?+

Yes. AutoSilenceCut supports standard microphone recording on iOS Safari, Android Chrome, and all major desktop browsers.

What format can I download my voice recording in?+

You can export uncompressed 16-bit PCM RIFF WAV masters for DAW editing, or copy automated Markdown show notes and transcripts.