Slow-down and loop trainer
Open a song
Your file stays on your device: nothing is uploaded.
No loop yet. Press Set A at the start of a passage, then Set B at its end.
Repeat and speed up
Speed trainer
Start slow and step the speed up every few repeats, a common way to practise a hard passage.
Off. Set a loop first, then press Start trainer.
Markers
Name the sections of the song (verse, solo, bar 17) and jump straight to them.
No markers yet.
Sound
Some early stereo records put a singer or a solo on one side only. Hear one side in both ears to pick it out.
Like a turntable running a little fast or slow: pitch and speed move together. 100 cents = one semitone. Works at 100 % speed only.
On this device, use the volume buttons.
Saved on this device
For each file, this browser remembers your speed, loop, markers and sound settings, keyed by the file's name, size and date. The audio itself is never stored or sent anywhere.
How to practise with it
- Open the recording and play it. Press Set A where a hard passage starts and Set B where it ends.
- Slow it down until you can play or sing along cleanly. The pitch does not change, so you stay in the same key.
- Speed it up a little at a time, or let the speed trainer do it every few repeats, until you reach full speed.
Browsers commonly play MP3, AAC/M4A, WAV and FLAC files. OGG and Opus play in most browsers too, but not in Safari before version 18.4. Below about 50 % the browser's stretching can blur fast notes.
In Indian music this patient, repeated practice is riyaz (Hindustani) or sādhakam (Carnatic).
Keyboard shortcuts
- Spaceplay or pause
- A Bset the loop start or end at the playhead
- Lloop on or off
- , .slower or faster by 5 %
- ← →back or forward 5 seconds
- [ ]move the loop earlier or later by its own length
- Nadd a marker at the playhead
With the A or B handle on the waveform focused, the arrow keys move it by 0.1 s (hold Shift for 1 s). Shortcuts pause while you type in a field.
Letter, number and punctuation shortcuts can be turned off: use the Keyboard shortcuts switch in the footer, under Display. Space, Enter, the arrow keys and Esc keep working.