Practice loop

Slow down without changing pitch, change key, loop A–B.

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How it works

Slowing down uses WSOLA: the length changes, the notes don't.
Changing key moves every note by semitones — handy to sing in another range or to match a guitar tuned down.
Only the chosen passage is processed, so it takes a moment even on a slow computer.

Everything happens on this device: no file is uploaded and nothing leaves the browser.