Centre-Channel Cancel
Subtracts what is identical in both channels, band-limited so the bass and the top survive. This is not stem separation: it removes the centred kick, bass and snare along with the vocal, leaves any stereo reverb behind, and does nothing at all to a mono file — which it detects and refuses up front.
Read this first
This is not vocal separation. It subtracts whatever sits identically in both channels, and nothing else. In an ordinary stereo mix the centre holds the kick, the bass, the snare and the lead instrument as well as the lead vocal, so all of those go with it. A vocal with stereo reverb on it leaves its tail behind, like a ghost in a large room.
On a mono file it does nothing at all — if the two sides are the same, subtracting them leaves zero.
The one reason it is still worth having is the band limit below. Subtract only inside a chosen range and leave the low notes and the high ones alone, and the bass and the cymbals survive — enough for a rough backing track. If you need real separation, this is not the tool.
Allow it and the recording happens in this tab alone. It is never sent anywhere.
Or drop an audio file
A stereo music file. If it is mono, you are told the moment it lands.
Everything happens in this tab. The file is never uploaded anywhere.
Feed it from
Video Editor
Assembles clips into a YouTube or Shorts upload in the browser: trim, order, transitions, a music bed and subtitles. Same-batch AI clips with hard cuts export losslessly without re-encoding.
Video Trimmer
Cuts a clip between two timestamps, copying streams without re-encoding when the cut is on a keyframe.
Video Converter
Reads MP4, MOV, WebM and MKV and writes MP4 (H.264 + AAC) or WebM (VP9 + Opus) with quality and resolution settings. When only the wrapper changes — MOV to MP4, MKV to WebM — the streams are copied untouched.
Video Compressor
Re-encodes to a target file size or a quality preset, stepping the resolution down when the bitrate would starve it, and shows the projected size before it starts and the actual size after.
Next
These accept what this tool produces, so the result can go straight in.
Audio Effects Rack
A chainable rack in one page: reverb by convolution with generated impulse responses, delay, chorus, flanger, EQ, compressor, fade and peak normalisation. The order of the chain is editable, because it changes the result.
Loudness Normaliser
Measures integrated loudness and true peak, then normalises to a target LUFS such as -14 or -16.
Vocoder
Dudley’s channel vocoder: splits a voice into N bands, follows each band’s envelope and paints it onto music or a built-in synth drone. Controls for band count, attack, release, formant tilt, sibilance pass-through and dry/wet.
Audio Converter
Converts between MP3, WAV, FLAC, AAC, OGG and Opus with bitrate and sample-rate settings.
Extract Audio from Video
Pulls the audio track out of a video as MP3, WAV, M4A or FLAC, or copies it without re-encoding.
Audio Trimmer
Cuts a section out of an audio file on the waveform, with fade in and fade out.