What makes a music bed loop cleanly
A loop works when the last bar hands back to the first bar without a click, a gap or a dropped beat.
The seam is the product
Most loops fail at the join: the file ends on a fill, a cymbal or a fade, so repeating it produces a stumble every pass.
The fix is structural. The arrangement has to end on the same harmony and the same instrument set it started with.
Length is a musical decision
A loop should be a whole number of bars. 30 seconds at 120 BPM is 15 bars, which is musically awkward; 32 seconds is 16 bars and lands cleanly.
For a five-minute meditation or a looping video, pick a length that divides evenly into the session rather than a round number in seconds.
Mixing for repetition
Leave the low end steady. A bassline that moves every bar becomes noticeable on the fifth repeat.
Avoid one-off sounds: a single cymbal crash is fine once and irritating eight times.
Keep the level consistent from bar one to the last bar; a loop that gets quieter each pass sounds broken.
Checklist
Whole bars, whole tempo.
Ends on the opening harmony, no fade.
No fill or crash in the last bar.
Repeat it five times and listen for the seam before you ship it.
Related
Game loop demo · How to write the brief
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