hELP!! PLIZZ!

Hello!, i have a problem with my DVS pack mk2 and my laptop, i have done that it works , but when im using mixvibes listnening some music in my turnables with mixvibes, some times the low sound start sounds very bad, and others times its sounds good, why that??
pliz help meee!,
PD: if i would know that mixvibes makes a lot of problems, i wouldnt bought it
pliz help meee!,

PD: if i would know that mixvibes makes a lot of problems, i wouldnt bought it
