Weird Sounds behaviour

can anyone tell me why i get this Weird jugged electronic type sound thing when i play it in unity ?? i cant seem to figure out why i get this Weird result :(

Edit : I'm using Unity 4.6 ( i had the problem in previous versions ) , the sound is 2D , both the AudioSource Holder Object and the Camera aren't moving , i tried to mute everything and play only this sound effect and still didn't work , i get this Weird result on every sound effect i have tho my sound effects are high quality , i also tried to manipulate the attributes of the AudioSource and still the same , the only sound that's working correctly is the background music , and just in-case all the sound effects were called by code except the background music ( this problem only occurs when i call the sound effects by code but if i made...lets say 3 AudioSource components of 3 different objects and placed a different sound effect on each one i dont get that Weird effect)