BPM Lock
Fix tempo drift. Lock every beat to one steady BPM.
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BPM Lock - Fix tempo drift. Lock every beat to one steady BPM.

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Fixes BPM drift in songs whose tempo wanders. Detects every beat and time-stretches each one onto a constant integer-BPM grid, so old records, live recordings and hand-played music play at one steady tempo from start to finish. Runs entirely in the browser.

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Old records and live recordings can drift away from a steady beatgrid. BPM Lock corrects that timing beat by beat while preserving pitch. Drop in a track, check and adjust the detected beats, then export a steady-tempo file for DJ sets, remixes and mashups. It is free, needs no account, and processes audio locally in your browser. Try the sample track and let us know how it handles your music.