Double Sided CD won't read

It's very common that DualDiscs won't work in all cd players, there's usually even a statement of that fact right on the case. The only one that I own actually works in my home player, a two year old Tube Technology player, but not in my car. It may be that they won't play because the Opus 21 uses a CD-Rom drive. Another example of technology for it's own sake, rather than improving our lives!

This is what happens when people deviate from accepted technical standards. The dual discs are thicker than the spec allows. The player is designed with the assumption that the discs meet the spec. If you buy a dual disc you are skating on thin ice...you might be OK, but maybe not.

Welcome to the rip off called DualDisc. Just about every hardware manufacturer has issued warnings that they may not play in their units as the discs are a tad thicker than Redbook CD's, DVD's and SACD's. Despite the known inherent flaw, the software manufacturers are hell bent on shoving them down the buying public's throat. To top off that issue the only spec for the DVD side is that it be at least as good as the CD type side (they can't call it Redbook because it doesn't meet the Redbook standard). That means there is no guarantee that the DVD side is going to be hi-rez.

You might consider voicing your issues to the record label(s) and the store(s) you bought them from.