i always thought i vaguely understood how compact discs worked. there's a shiny side with some grooves in it and a laser beam reads the grooves and then magic happens and music comes out. but i recently came into ownership of a previously used cd. some of the silver had flaked off, so the cd is see through in those parts. i figured it wouldn't play but tried it anyway. and guess what! it does play! which completely destroys my understanding of technology. do cd's not need a shiny side? if not, why haven't bands been putting out cool see through cds?