Automatic Loop Point Finder
Give it an approximate region—not perfect markers. AudioWrench searches nearby starts and lengths, ranks boundary continuity, lets you nudge exact frames, and builds a repeated seam audition before export.
TIMELINE MAP
Loop Seam Candidates
Turn one long waveform into deliberate boundaries. The visual emphasizes the selection, transition and resulting edit so that timing decisions remain obvious before anything is rendered.
Open the full signal breakdownBest source, processing logic, limits and three-pass listening check
- Loop source region
Start with the right material
Finding sustain loops in instruments, ambience, drones, game audio and textures when manually hunting zero crossings is slow or misleading.
- Rank matching seams
Understand the transformation
A bounded search compares sample value, slope, stereo behavior and short-window energy around candidate boundaries; selected seams can then receive an equal-power crossfade before repeat audition and export.
- Seamless loop
Verify the usable result
Ranked loop candidates, zoomed boundary views and an exact finite WAV loop with JSON and text metadata for the chosen start, end and crossfade.
Where this workflow stops
A low mathematical seam score cannot guarantee a musically natural repeat. Evolving harmony, rhythm, noise and long-term modulation may still reveal the loop, so candidates require listening in context.
Make the final decision by ear
- Zoom into every boundary and listen across it, not only inside it.
- Leave intentional handles when another editor will continue the work.
- Verify exact duration and ordering after the final render.
- Automatic shortlist
- A bounded two-dimensional search compares nearby start positions and loop lengths instead of returning one unexplained marker.
- Multi-feature seam score
- Value, slope, curvature, short-window energy and stereo continuity contribute to an inspectable ranking.
- Exact handoff
- Nudge boundaries in individual sample frames, audition equal-power overlaps, then export the precise decoded region.
How to find better audio loop points automatically
- Load local audio or explicitly generate the seam-lab demo.
- Set an approximate target, minimum and maximum length, search radius and analysis window.
- Run the bounded search, compare ranked candidates and nudge either edge by sample frames.
- Audition three overlapped repetitions, then export exact WAV, JSON or CUE metadata.
Automatic search, not another manual loop maker
Audio Loop Maker is for a region you already know: choose the markers, optionally snap near a zero crossing and render repetitions. This finder tackles an earlier decision. It searches many nearby start-and-length pairs and shows the strongest candidates, while keeping the final boundary choice yours.
What a low seam score can—and cannot—tell you
A lower score means the end and beginning look more locally continuous across the measured waveform features. It does not understand chord resolution, rhythmic phrasing, evolving reverb or whether a listener notices the edit in context. Use ranking to reduce the search space, then listen.
Privacy: selected audio is decoded, searched, auditioned and exported on this device. It is not uploaded to AudioWrench.
Automatic Loop Point Finder: quick answer and technical limits
Quick answer: An automatic seam-search workspace that scores many nearby start and end pairs, ranks the least discontinuous loop candidates and lets the user audition and fine-tune them.
- Best for
- Finding sustain loops in instruments, ambience, drones, game audio and textures when manually hunting zero crossings is slow or misleading.
- How it works
- A bounded search compares sample value, slope, stereo behavior and short-window energy around candidate boundaries; selected seams can then receive an equal-power crossfade before repeat audition and export.
- What you get
- Ranked loop candidates, zoomed boundary views and an exact finite WAV loop with JSON and text metadata for the chosen start, end and crossfade.
Know before you use it: A low mathematical seam score cannot guarantee a musically natural repeat. Evolving harmony, rhythm, noise and long-term modulation may still reveal the loop, so candidates require listening in context.
Privacy: Selected audio is processed in this browser and is not uploaded to AudioWrench. Normal page assets can still be requested as described in the privacy notice. Privacy details →