Audio Loop Crossfade Length Calculator
How does overlapping the ends of a loop change its repeat duration and sample budget?
Method, formula and assumptions
Round duration and overlap separately to whole samples. Repeat period = (original samples - overlap samples) / sample rate. Continuous elapsed time is repeat count x that period.
Input definitions and supported units
- Original loop duration (seconds): Measured or assumed numerical value, from 0.001 to 100000; must be positive.
- End overlap (ms): Measured or assumed numerical value, from 0 to 100000; zero is supported where the stated method permits it.
- Sample rate (Hz): Whole-number count, from 8000 to 384000; must be positive.
- Repeat count: Whole-number count, from 1 to 100000; must be positive.
Worked example with answer
A 4-second loop at 48 kHz has 192,000 samples. A 100 ms overlap uses 4,800 samples, making a 3.9-second repeat period and 31.2 seconds for eight complete loop periods.
How to use the results
This models a continuously repeating overlapped loop. It is not the length of a finite arrangement that keeps an un-overlapped first or last tail.
Results retain full precision internally and display up to four decimal places. Very small nonzero results use scientific notation rather than appearing as zero. Check the labels before comparing values across units.
Limitations and references
This budgets length only; crossfades do not guarantee click removal or musical beat alignment. The overlap must remain shorter than the rounded source.
The method is a self-contained arithmetic, geometric or explicitly stated mathematical model. There are no imported tariffs, empirical presets or equipment specifications; measured values and allowances must come from your own process.
Related planning tools
Creator & reviewers
Creator persona
- Casey RowanUnits, conversions & measurement
Reviewer personas
- Devon ShawFormula & assumptions review
- Sage MitchellClarity & usability review