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little-endian · 21-04-2002

@swift
Read the article "The Truth About Offsets" carefully. If you use the combined read/write offset correction you'll loose at least the amount of samples which are equivalent to the write offset of your burner!
If you want to make *PERFECT* copies you'll have to correct the offsets on reading and writing SEPERATELY!

But if your burner has for example a negative offset on writing (e.g. -30), the burner starts writing too early. So you have to overburn into the Lead-Out to record actually the last 30 samples.
If the drive isn't capable to do this, the last samples will be missing. On reading the drive fills up the uncomplete sector with zeros (my own theory, I don't know if this is true!!!) so the last 30 samples are ALWAYS zero (tested with my PlexWriter). If your music wave contains absolutely digital silence, then it doesn't matter because the samples would be zero in both cases...

OK now my burner has a read offset of -30 samples (PX-W1210S) and DOESN'T support overwriting into lead-out.
Anyway I don't want a generation loss.
So I correct the read offset, of course.
On writing, I don't correct the offset, because no data is destoyed (in opposite to the read-offset). I correct the written offset on reading using the combined offset if I have want to copy the copy again.
The copy on CD itself is NOT perfect, of course. But I can get the "TRUE" data at all times. So I have at least no generation loss. I personally don't like the thought, that my data is getting "worse" on copying. That's why I correct the offsets!

I have the same opinion like Upp3rd0G, that offsets are so small that you don't need to care about. But are we not all perfectionists? (At least on this forum ;-))
We want to perfectly copy SD2, SecuROM and all other CDs, so why not copy an audio CD perfectly???

21-04-2002	#13 (permalink)
little-endian CD Freaks Senior Member Join Date: Apr 2002 Location: Germany Posts: 280	@swift Read the article "The Truth About Offsets" carefully. If you use the combined read/write offset correction you'll loose at least the amount of samples which are equivalent to the write offset of your burner! If you want to make PERFECT copies you'll have to correct the offsets on reading and writing SEPERATELY! But if your burner has for example a negative offset on writing (e.g. -30), the burner starts writing too early. So you have to overburn into the Lead-Out to record actually the last 30 samples. If the drive isn't capable to do this, the last samples will be missing. On reading the drive fills up the uncomplete sector with zeros (my own theory, I don't know if this is true!!!) so the last 30 samples are ALWAYS zero (tested with my PlexWriter). If your music wave contains absolutely digital silence, then it doesn't matter because the samples would be zero in both cases... OK now my burner has a read offset of -30 samples (PX-W1210S) and DOESN'T support overwriting into lead-out. Anyway I don't want a generation loss. So I correct the read offset, of course. On writing, I don't correct the offset, because no data is destoyed (in opposite to the read-offset). I correct the written offset on reading using the combined offset if I have want to copy the copy again. The copy on CD itself is NOT perfect, of course. But I can get the "TRUE" data at all times. So I have at least no generation loss. I personally don't like the thought, that my data is getting "worse" on copying. That's why I correct the offsets! I have the same opinion like Upp3rd0G, that offsets are so small that you don't need to care about. But are we not all perfectionists? (At least on this forum ;-)) We want to perfectly copy SD2, SecuROM and all other CDs, so why not copy an audio CD perfectly???