TikTok Sounds vs a file you bring
Sounds (commercial / user sounds in-app) are the native path: timing is clipped inside TikTok, discovery features work, and you are not responsible for manufacturing a splice. Bring your own file when the brief demands original music — then you own the seam.
In-feed replay is the stress test
Like Reels, TikTok will show your clip again immediately for anyone who stays. Design the audio for the second play. A joke that lands on the downbeat after replay needs a silent splice, not a louder mix.
CapCut is the default editor — and the usual culprit
Most TikTok drafts still pass through CapCut. CapCut’s trim can clip the loop point on export. Order of operations:
- Finalize picture length.
- Build a seamless bed of that length in Loop Music.
- Drop into CapCut; do not pinch the audio ends “to make it fit.”
- Export → upload to TikTok → listen to one auto-replay.
Transitions and “perfect loop” videos
Visual match-cuts that meet at 0:00 and the end are a editing trick; they still fail if the audio seam clicks. Lock audio first, then design the visual loop to the same frame count.