I whatever reason I actually own multiple copies of the few CDs. I guess it is time for a test this weekend.. :-)
I will first play all pairs unmarked, just to be sure neither one has any defects, etc. After marking them I can get someone to switch them back and forth, so I will not know which is which.
I will first play all pairs unmarked, just to be sure neither one has any defects, etc. After marking them I can get someone to switch them back and forth, so I will not know which is which.