A copy of a CD can indeed appear to be better than the original. The reason is simple: the Red Book defines that the bit stream from an audio CD is processed in real time. In essence, this means that any time there is a read error, error correction needs to kick in, which will degrade the sound to some degree.
Conversely, if the copy machine actually does a CD-ROM read of the CD , that is, it builds a faithful copy of the CD in memory and then writes the copy, the copy may sound better when played in Red Book mode; error correction will not have to work as hard on the copy.
Conversely, if the copy machine actually does a CD-ROM read of the CD , that is, it builds a faithful copy of the CD in memory and then writes the copy, the copy may sound better when played in Red Book mode; error correction will not have to work as hard on the copy.