Loop Audio

Loop any part of a song, lecture or recording. Load an audio file, set the loop start and end with the sliders or the “Set A” and “Set B” buttons while it plays, and the section repeats seamlessly. Slow it down for practice, then export the loop repeated as many times as you like as a WAV file. Your audio never leaves your device.

How to loop part of a song

1. Load an audio file from your device — MP3, WAV, M4A or OGG.
2. Drag the loop start and end sliders, or play the track and press “Set A” at the start of the section and “Set B” at the end.
3. Press “Play loop”. The section repeats seamlessly until you press Stop, and the yellow playhead shows the position.
4. Adjust the loop while it plays — changes take effect immediately.
5. Slow the playback down if needed (pitch changes with speed in the looper).
6. Export the section repeated several times as a WAV file to practise with anywhere.

The loop uses your browser’s Web Audio engine, which repeats the exact samples between the two points, so there is no gap when it jumps back to the start.

Why musicians loop sections

Repetition is how difficult passages become easy. Looping a two-bar lick, a chord change or a drum fill lets you hear it dozens of times in a row and play along without stopping to rewind. Many teachers recommend looping a short section slowly until it is clean, then gradually raising the speed, then widening the loop to include what comes before and after so the passage connects to the rest of the piece. Transcribers use loops to work out exact notes, and singers use them to learn harmonies and phrasing.

Finding clean loop points

• Set loop points on the beat — at the start of a bar — so the loop keeps time.
• Zoom in by making the loop shorter and adjusting in small steps; the value shows two decimal places.
• Listen for a click at the loop point; moving the end a few hundredths of a second usually removes it.
• For practice loops, include a beat or two before the tricky part so you can get into it.
• For exported loops, the tool adds a very short crossfade at each join to reduce clicks.

Uses beyond music

Worked example

A bass player is learning a fast fill that starts at 1:42 in a song. They load the MP3, play from start, press “Set A” just before the fill and “Set B” at the downbeat after it, giving a loop from 101.80 to 104.60 seconds. At 0.75× speed they play along for ten minutes, then return to 1.0×. Finally they export the 2.8-second loop repeated 20 times — a 56-second WAV — to practise on their phone during the week.

Practice routine with loops

1. Find the hardest two to four bars and set a loop around them.
2. Listen five times without playing, humming or tapping along.
3. Slow the loop until you can play it cleanly, even if that is 60% speed.
4. Play along ten times clean before speeding up by 5–10%.
5. Widen the loop by a bar on each side so the passage connects to the music around it.
6. Finish by playing along with the full song at normal speed.

Ten focused minutes on a loop usually achieve more than playing the whole song repeatedly, because every repetition targets the part that needs work.

Exported files

The export repeats the selected section the number of times you choose and saves an uncompressed WAV at the original speed and pitch. WAV files are large — about 10 MB per minute of stereo audio — so keep repeat counts sensible for long sections. You can convert the WAV to MP3 in most audio apps if you need a smaller file.

Copyright

Looping recordings for personal practice and study is a normal use of music you own or have access to. Sharing or publishing loops made from commercial recordings — for example as samples in your own tracks — generally needs permission from the rights holders.

Privacy

Audio files are decoded and played entirely in your browser. Nothing is uploaded or stored.