I don't know if the redbook layer of hybrid SACDs is carefully downsampled from the SACD layer or is just the old 16/44.1 file from the plain old cd release laying around. I think it would probably vary from SACD to SACD, but it would be nice to know if anyone has knowledge about this.
I don't trust record labels and think that they have a financial interest in the SACD layer sounding better than the redbook layer, but I really don't have any facts about the question. Does anyone know how the redbook layer of hybrid SACDs is handled?