If you're attempting to loop an .mp3 file, try using a .wav file instead. It won't be possible to perfectly loop the .mp3 as by default that format adds an empty space in the beginning of the file.
Lens Studio Support
- How should I report bugs and crashes?
- Can I print my Snapcode before my Lens is complete?
- Can I keep my Lenses private?
- How can I combine multiple templates?
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- Why does my PNG animation sequence immediately deteriorate in quality once I upload it as an animation texture?