Cubase 7 Weird sound..

Whenever I play via midi controller or hear off of Cubase 7, there is this weird sound that really bugs me. I can’t really describe the sound, but it sounds like, as an example, as if when there is an audio playing back and computer just crashes, and that sound you hear like rolling R… If my explanation of the sound can’t get through clearly, I will do my best to try to record it and link to the audio…

My cubase just arrived today so I’m still experimenting with a lot of stuff.