Antigrunge,
It all depends on CD. Regular real time CD player reads only once and when sample is bad (bad checksum) it corrects (Cross Interleaved Reed-Solomon error correction code) or interpolates. It has ability to correct errors smaller than 4mm scratch (along the track), interpolates between 4-8mm and skips (gap) over 8mm. My MAX set to "do not allow to skip" goes forever over bad sector until it finds right checksum sometimes never finishing (never interpolates) and Itunes is perhaps somewhere in between - making few attempts, then interpolating. On good brand new CDs all programs might do very good job. Sonic differences (interpolation) will most likely show on heavily used older CDs. I use MAX because it makes me feel better to have perfect copy.
It all depends on CD. Regular real time CD player reads only once and when sample is bad (bad checksum) it corrects (Cross Interleaved Reed-Solomon error correction code) or interpolates. It has ability to correct errors smaller than 4mm scratch (along the track), interpolates between 4-8mm and skips (gap) over 8mm. My MAX set to "do not allow to skip" goes forever over bad sector until it finds right checksum sometimes never finishing (never interpolates) and Itunes is perhaps somewhere in between - making few attempts, then interpolating. On good brand new CDs all programs might do very good job. Sonic differences (interpolation) will most likely show on heavily used older CDs. I use MAX because it makes me feel better to have perfect copy.