Honda Ridgeline Owner's Manual page 209

5. Discs with scratches, dirty discs
Fingerprints, scratches, etc.
CD-R or CD-RW may not play due
to the recording conditions.
Scratches and fingerprints on the
discs may cause the sound to skip.
Recommended discs are printed
with the following logo.
Protecting Your CDs
Audio unit may not play the
following formats.
This audio unit cannot play a Dual-
disc .
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