I'm not dreaming - these are great CD copies

Multiple generations of read/writing increases the error count of the original by quite a margin.
Once a zero or one (from the previous readable pit) has been substituted for the original unreadable pit, there is no way it can be resurrected to be a readable original.
There is always only a downhill slide the more times it read and written.

Cheers George

reduced jitter by burning a CD-r copy.

This mainly depends on what the jitter spec is of the dac and it's interface to the transport/streamer that doing the last d to a conversion, not so much if a original or burnt copy is used.

Cheers George

georgehifi
Multiple generations of read/writing increases the error count of the original by quite a margin.
Once a zero or one (from the previous readable pit) has been substituted for the original unreadable pit, there is no way it can be resurrected to be a readable original.
There is always only a downhill slide the more times it read and written.

>>>>Uh, for starters the pits aren’t readable. The highly reflective “land” is actually what sends a return signal back to the photodetector. When the laser beam hits a pit the signal is canceled by wave interference. You know, due to the depth of the pit and the wavelength of the CD laser. Also, neither the pit nor the land is a 1 or a 0. The information contained on the disc doesn’t become 1s and 0s until downstream of the optical read process. The lengths of the pits and lands are variable. So it’s the combination of the length of the pits and lands in certain predetermined sequences that determines the digital data - 1s and 0s - downstream.

Do your homework Geoff, if a pits/land can’t be read because of a cd burn or scratch or defect, it’s substituted by the same last readable one, it’s a 50/50 chance of being right, that is simply what error correction is.

Cheers George