Go away, like I said can't see the forest through the trees.
For those interested in what happens when a byte can't be read.
If a scratch has created read errors, you’re not completely hosed., "there is a pretty good chance that an uncorrected byte still has a good byte on either side". If that’s the case, then your CD player will take an average for those two values "and make an "educated guess" about what the missing value should be in between".
If the number of missing bytes gets to be too large, the system will suppress the error by muting the sound for a fraction of a second, which is hopefully too short a period of time to be detected.
At a certain point, of course, you’ll start to hear the difference. Like when the CD starts to repeat.
Cheers George