01Phase 01
1. 80Hz Sub-Rumble High-Pass Filter
Eliminates low-frequency mechanical vibrations, microphone handling noise, and AC air-conditioning rumble instantly in browser Web Audio.
100% Browser DSP · Zero Upload
Free Audio Cleanup Tool & Background Noise Remover
Clean background hiss, 50Hz/60Hz electrical hum, and HVAC rumble from spoken voice recordings using 100% browser-local DSP filtering and downward room-tone expansion.
Free Audio Cleanup Tool & Background Noise 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. 50Hz / 60Hz Electrical Hum Notch
Isolates and strips electrical grounding hum (50Hz Europe, 60Hz North America) with a high-Q digital notch filter that preserves vocal clarity.
03Phase 03
3. Downward Room-Tone Expander
Attenuates stationary room noise and hiss during silent dialogue pauses while maintaining natural acoustic decay.
Connected finishing workflows
Explore companion utilities for dialogue cleanup, speech pacing, and mastering.
Studio Audio Enhancer
Add broadcast vocal presence EQ, warmth, and dynamic broadcast limiting.
Mouth Sound Remover
Clean up lip smacks, saliva pops, and mic clicks transparently.
Silence Remover
Cut awkward quiet gaps while preserving natural 0.32s speech breathing cushions.
Audio Standards & Research
Engineering guides & deep-dive workflows
Explore the acoustic principles, ITU-R loudness standards, and pacing techniques behind this tool.
Noise Removal8 min read
How to Remove Background Noise From Audio: A Practical, Source-First Workflow
Diagnose noise types before touching a filter. Learn where 80Hz rumble and 50/60Hz mains hum live and how to apply downward expansion safely.
Mains Hum6 min read
How to Reduce Hum and Low Rumble in a Voice Recording
Pinpoint 50Hz/60Hz electrical harmonics and sub-80Hz mechanical rumble with steep Butterworth high-pass and notch filtering.
Preamp Hiss7 min read
How to Reduce Preamp Hiss in Microphone Recordings Without Muffling Speech
Differentiating stationary preamp hiss from acoustic room noise: multiband downward expansion and spectral attenuation without robotic phasing.
Frequently Asked Questions
Common Questions & Technical Clarifications
How to remove background noise from audio recordings?+
To remove background noise from audio: 1. Drag and drop your WAV, MP3, or M4A voice recording into the workspace. 2. The browser-local DSP pipeline applies an 80Hz Butterworth rumble filter, 50Hz/60Hz mains hum notch filter, and downward room-tone expander during quiet pauses. 3. Audition the cleaned output in real time and export an uncompressed 16-bit PCM WAV master file.
Will background noise removal distort speech or make vocals sound metallic?+
No. Unlike crude phase-cancellation algorithms that strip vocal frequencies, our filter stages target non-speech frequencies (sub-80Hz rumble and narrow 50Hz/60Hz notch bands) while the downward expander operates only during dialogue pauses, preserving 100% of vocal timbre and natural harmonics.
Is my video or audio file uploaded to a remote server for processing?+
No. Zero bytes of your recordings are ever uploaded. All DSP analysis, biquad filtering, and rendering run strictly in client memory on your device CPU.
Can I clean noise from video files directly?+
Yes. You can import MP4, MOV, or WebM video files. The tool demuxes the audio in memory, filters background rumble, and allows previewing in sync with the video timeline.
What formats are exported after noise removal?+
You can export studio-master 16-bit PCM RIFF WAV audio at the native sample rate (44.1kHz or 48kHz), or export NLE edit decision lists (EDL, FCPXML, Audacity labels) for downstream timeline integration.