10Other InformationCDsWhen playing audio CDs, note the following:• DN-500DC can play Music CDs, CD-R, and CD-RW discs. The disc file system can beeither CD-DA (CD-Text) or CD-ROM (ISO9660).• Do not play discs in non-circular shapes (heart-shaped discs,octagonal discs, etc.; see image) or discs that have beenrepaired with adhesive or tape. These can damage the unit.• DN-500DC can play finalized discs only. (Finalization is the process that makes recordedCD-R discs playable on compatible players.)• Depending on the software used to burn a CD (or other conditions) some CDs may notplay correctly.When playing CDs with audio files, note the following:• The writing software format must be ISO9660 Level 1.• You can have up to 300 folders and up to 8 folder levels, including the root directory.• You can have up to 300 audio files. If the CD contains more than 300 files, some audiofiles may not play or appear correctly.• File names, folder names, and text characters can use up to 255 characters. Onlyuppercase letters, lowercase letters, numbers, and symbols can be displayed. Japanesefile names will not be shown. File names that begin with a “.” will not be shown.• Copyright-protected files might not play properly and/or may appear as Unknown File.• Depending on the software used to burn a CD (or other conditions) some files may not playor appear correctly.• When playing audio files on a CD, DN-500DC supports the following tag data:o ID3 tags: Version 1.x and 2.xo META-tags: compatible with title,artist, and album nameso Sample rate: 44.1 kHzo Bit rate: 32–320 kbpso Format: MPEG1 Audio Layer 3o File extension: .mp3Be careful not to scratch discs when removing them from their cases.Do not bend or heat discs, and do not enlarge the hole in the center ofthe disc. Do not write on the labeled surface of the disc or attach newlabels to discs.If fingerprints, dirt, or condensation are on a disc, clean it with acommercially available disc cleaning set or a soft, dry cloth. Gentlywipe it from the inside towards the outside, not in a circular motion. Donot use record spray, antistatic agents, benzene, thinner, or othersolvents.After using discs, remove them from the unit and store them in theircases to protect them from dust, scratches, warping, etc. Do not storediscs in places exposed to long periods of direct sunlight or placesexposed to heat, dust, humidity, etc.