Your live take doesn't land on the grid.
GrooveExtract separates six stems, reads the tempo and key, and time-stretches a fluctuating recording onto a strict BPM grid in one continuous pass.
A real take, recorded here: 30 seconds drifting from 100 to 110 BPM.
10 beats sit off any useful grid. Every loop, every edit, every DAW quantize fights them.
Flex-time smears the transients you played. Cutting by ear takes an hour you don't have.
The fix is not smaller edits. It's a real time map.
Scroll to straighten.
Real data: the 100→110 BPM drift fixture, and the 104 BPM export the shipped engine verified to ±1.4 ms. Keep scrolling or click above to audition.
An instrument, not a toy.
Everything under the grid is measured output, not marketing copy.
Tempo Lock
Beats and downbeats you can drag by hand. One Rubber Band R3 pass, transients stay on the beats.
Six stems
Demucs v4, six sources. Locked stems stay sample-aligned.
Exits
- WAV 24-bit · Pro
- MP3 320 · Free
- Ableton .asd sidecar · Warp markers
- MIDI tempo map · mido
- Baked click track · optional
- Stems ZIP · every stem
The grid holds. Your take doesn't have to.
Start straighteningFree: 2 uploads and 3 locks a month · Pro: 60-minute takes, WAV 24-bit, priority queue