Sony ICF-DVD57TV Operating Instructions Manual page 34

Music discs encoded with copyright
protection
This product is designed to play back discs
that conform to the Compact Disc (CD)
standard. Recently, various music discs
encoded with copyright protection are
marketed by some record companies. Please be
aware that among those discs, there are some
that do not conform to the CD standard and
may not be playable by this product.
Attention Regarding DualDisc
Software
A DualDisc is a two sided disc product which
mates DVD recorded material on one side with
digital audio material on the other side.
However, since the audio material side does
not conform to the Compact Disc (CD)
standard, playback on this product is not
guaranteed.
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