Get good program like EAC. I use (free) XLD on the Mac. Program can go to given sector multiple times until you'll get proper checksum (I set my XLD to 200 attempts max). You are extracting data. What is stored on your HD is data and not the music.
Difference between Itunes and better ripping programs is number of times it goes to the same sector before quitting and using interpolated data. This difference would be bigger on badly scratched CDs and most likely inaudible on brand new.
Difference between Itunes and better ripping programs is number of times it goes to the same sector before quitting and using interpolated data. This difference would be bigger on badly scratched CDs and most likely inaudible on brand new.