What a joke. I think Warners and RCA had something called CD-4. Whatever that meant.
THERE were 5 to 7 different formats. Doomed from the start.
RCA had one too; (something ??-4)
can't remember the others..........
This makes the super DVD wars seem like a lot more petty (LOL.)
Today it's all about COPYRIGHTS, not the CONSUMER!!!