Audio Looper

Loop any audio and stretch it to the length you need

This audio looper repeats a sound so it lasts as long as you need. Loop a whole song, or drag across the waveform to pick just a drum pattern, a rain recording or a four-bar riff. Then repeat it a set number of times, or tell it a target length such as 10 minutes or one hour and it works out how many repeats fit.

Joins are smoothed with an equal-power crossfade: the end of one repeat blends into the start of the next, so the loop point does not click or pop. Set the crossfade from 0 to 5 seconds, or switch it off for tempo-exact music loops.

Long loops are written to the file one second at a time. The finished hour never sits in memory as raw samples, so a long result does not crash the tab. Your file is never uploaded.

How to use the Audio Looper

1. Drop an audio file onto the box or click to choose one (up to 20 minutes).
2. To loop only part of it, drag across the waveform or type the Loop starts at and Loop ends at times.
3. Under Repeat choose A number of times and type the count, or Until a length and type the total in hours:minutes:seconds. For a length, say whether to stop exactly there or finish the last loop.
4. Set the Crossfade. 50–200 ms hides most clicks. Use a longer crossfade for ambient sounds and none for loops cut exactly on the beat.
5. Press Hear the loop point to listen to a few seconds either side of the first join, then choose a format and press Make the loop.

Audio Looper features

How big will the file be?

The size depends on the format and quality, not on whether the sound repeats. These are approximate figures for stereo at 44.1 kHz.

Getting a loop that does not click

• Cut on a quiet or repeating moment. Loops from rain, wind, fans, a hum or a pad hide their joins easily.
• For music, choose start and end points on the same beat. Use the BPM Detector to find the tempo and calculate the bar length (60 ÷ BPM × beats per bar).
• If you still hear a bump, lengthen the crossfade. Longer crossfades shorten each repeat by the same amount.
• Preview the join with Hear the loop point before you commit to a long export.
• To trim the file first, use the Audio Cutter. To add several different files together, use the Audio Joiner.

Common uses

• Sleep, study and focus tracks such as rain, white noise or ambient music for an hour or more.
• Practice tracks: loop a difficult passage again and again.
• Game, video and presentation backgrounds that must run longer than the original clip.
• Karaoke or dance practice with a chosen section repeating.