CellopediaPractice Room

Slow Downer & Loop Trainer

Upload a recording or paste a YouTube link. Slow it down without changing pitch, and loop the two bars that are actually the problem.

0:000:00
Speed (pitch preserved)
Loop a passage

This tool is built into the practice room.

Free forever, no account needed. When you want the full library, the practice room is a sign-in away.

Open the practice room

Loop the problem, not the piece

Most practice time leaks away replaying music you can already play. Set the A marker just before the passage that breaks down and the B marker just after it, then let it cycle at 70% speed while you play along. The loop removes the temptation to 'take it from the top.'

Pitch-preserved slow-down, in the browser

Uploaded audio uses your browser's built-in time-stretching, which keeps pitch constant while the tempo drops — no software to install. YouTube playback uses YouTube's own pitch-preserving speed control. Both are free without an account.