hello its my  second » RME uc  with  cracklings noise on outputs in my macbook pro

the first I had, had exactly the same probleme a month ago
so I returned it to the seller !

the second have the same troubles !

cracklings noise

shread noizes

pops

here an exemple of what we can hear every 2 minutes aproximatively
Its on reading only. I have record this with iphone on speakers

https://dl.dropboxusercontent.com/u/862 … %2C23s.mp3

listen at 20s/28s/2,23s

So before you say that there is a problem unit to return, other persons have these problem and in this case the second unit is a new one

so what about a problem with the last macnook pro I7 on mountain lion ?
any idea

Pease I need an answer cause its simply impossible to work with it

Thanks in advance

macbook pro 2012 - mountain lion updated
Logic pro last Version