But all class sound grottig

I searched long for a program to videos of console games record to the PC. With the grabber that works well so far wonderful. The installation was easy super, because the link to the Windows 7 driver stood on the enclosed list. Therefore, so no problems. The program is also easy to use and recording works great. The image quality is sufficient for me, everything is OK! But the sound ...... atrocious. I do not know why but every recorded video brings a completely distorted and overdriven sound with it. This benefits me nothing. I wanted to videos for my site have yet so I can not make pure. In the program it is not, because I've tried it with Nero, there is the sound so horrible.
If no one else have the problem, it must probably be my fault, but in various forums I have already read of the problem.

ADDENDUM:
The problem with the sound, I could now solve halfway. In the device properties of Windows I was able to change the input level. The standing start to 100 and I had him on 2 thus chokes down the tone of the recorded video is compatible. Now I can also upload the videos without everyone gets a hearing impairment.