Ambiente Sound Cut When Looping

Hi guys i add rain to my game that supposed to play in loop, the problem is that i had the Audio Source to to rain component and add the audio file, i check loo and play on awake but when the transition happens i hv a slow 1/4sec of silence… I try mp3 file, wav file but nothing… i try all the options audio import. Do i need script this to play just fine or i have to change something in the options

If someone can help me i appreciate.

Bump!! Anyone plz