(SOLVED) How do I superpose sounds?

Hello to all

in my game title, i have 3 sounds

a rain sound, who is in loop and start when the layer start.

a ambient music, in loop who start when the layer start

and a lightning sound, who only run when a layer "lightning" appears

But i have a problem, the sound lightning when he start, it has some kind of "echo" or "delay", but my original sound dont have that thing, where this problem come from??

Hello to all

in my game title, i have 3 sounds

a rain sound, who is in loop and start when the layer start.

a ambient music, in loop who start when the layer start

and a lightning sound, who only run when a layer "lightning" appears

But i have a problem, the sound lightning when he start, it has some kind of "echo" or "delay", but my original sound dont have that thing, where this problem come from??

Do you use any effects in c2? look in the javascript console (of your browser) if there is some problem with the sounds...

well i dont use "sound effects" on my ogg files, but i use webgl effects on my backgrounds

(SOLVED)