2008 Nissan Altima Owner's Manual - Page 179

1. MP3 or WMA file not supported → "UNPLAYABLE TRACK" → Go to next track 2. CD ROM → "No Audio Track" → Eject disc and go to the last mode (CD player only) / Go to next disc (CD changer only) 3. TEMP/MECH ERROR → "PRESS EJECT" 4. READ/FOCUS ERROR → "CHECK DISC" CHECK DISC: ● Confirm that the CD is inserted correctly (the label side is facing up, etc.). ● Confirm that the CD is not bent or warped and it is free of scratches. PRESS EJECT: This is an error due to excessive temperature inside the player. Remove the CD by pressing the EJECT button. After a short time, reinsert the CD. The CD can be played when the temperature of the player returns to normal. UNPLAYABLE: The file is unplayable in this audio system (only MP3 or WMA CD). Compact Disc with MP3 or WMA Terms: ● MP3 - MP3 is short for Moving Pictures Experts Group Audio Layer 3. MP3 is the most well-known compressed digital audio file format. This format allows for near "CD quality" sound, but at a fraction of the size of normal audio files. MP3 conversion of an audio track from CD-ROM can reduce the file size by approximately a 10:1 ratio with virtually no perceptible loss in quality. MP3 compression removes the redundant and irrelevant parts of a sound signal that the human ear doesn't hear. ● WMA - Windows Media Audio (WMA)* is a compressed audio format created by Microsoft as an alternative to MP3. The WMA codec offers greater file compression than the MP3 codec, enabling storage of more digital audio tracks in the same amount of space when compared to MP3s at the same level of quality. ● Bit rate - Bit rate denotes the number of bits per second used by a digital music file. The size and quality of a compressed digital audio file is determined by the bit rate used when encoding the file. ● Sampling frequency - Sampling frequency is the rate at which the samples of a signal are converted from analog to digital (A/D conversion) per second. ● Multisession - Multisession is one of the methods for writing data to media. Writing data once to the media is called a single session, and writing more than once is called a multisession. ● ID3/WMA Tag - The ID3/WMA tag is the part of the encoded MP3 or WMA file that contains information about the digital music file such as song title, artist, encoding bit rate, track time duration, etc. ID3 tag information is displayed on the Artist/song title line on the display. * Windows and Windows Media are registered trademarks and trademarks in the United States of America and other countries of Microsoft Corporation of the USA. Monitor, climate, audio, phone and voice recognition systems 4-23