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195.86.126.19

It's a player (design) flaw if a just onder spec disc get stuck in a player that is 'on the limit' of the spec.

This is especially the case if the player is a DVD player.

Another entirely different issue is 'layer thickness' (0.9mm for DD CD side) .
A deviation in that spec can throw off the focussing and tracking mechanism.
Normal CD players should be able to cope with dualdisc.

CD players that happens to be sa-cd players as well can get into trouble.
If the player defaults to sa-cd readout it looks for layers at 1.2 and 0.6 mm and at the 0.9mm DualDisc CD layer is smack in the middle.
If the players firmware is programmed to conclude (wrongly) that in that particular case the disc is defective because it can't focus on the expected layer thickness (0.6 and 1.2) then it probably refuses to play at all.
(This could make the player incompatible with redbooks minimum spec)

It's hard to blame the problem on DualDisc or the player without nowing exactly what is going on in the players internal logic.

Frank

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